Q.Read the source given below carefully and answer the questions that follow : The Malabar Coast (Present-day Kerala) Here is an excerpt from Periplus of the Erythraean Sea, composed by an anonymous Greek sailor (First century CE) : They (i.e. traders from abroad) send large ships to these market-towns on account of the great quantity and bulk of pepper and malabathrum (possibly cinnamon, produced in these regions). There are imported here, in the first place, a great quantity of coin; topaz... antimony (a mineral used as a colouring substance), coral, crude glass, copper, tin, lead ... There is exported pepper, which is produced in quantity in only one region near these markets.... Besides this there are exported great quantities of fine pearls, ivory, silk cloth, .... transparent stones of all kinds, diamonds and sapphires, and tortoise shell. Archaeological evidence of a bead-making industry, using precious and semi-precious stones, has been found in Kodumanal (Tamil Nadu). It is likely that local traders brought the stones mentioned in the Periplus from sites such as these to the coastal ports. (31.1) Mention the role of rivers in the promotion of trade.

Let’s take each part one by one, keeping the NCERT-style reasoning and the given source firmly in view.

(31.1) Mention the role of rivers in the promotion of trade.

Rivers served as natural highways for the movement of goods. They connected inland production centres — like the bead-making site at Kodumanal — to coastal ports, from where ships carried those goods to foreign markets. Without rivers, transporting bulk items like pepper, stones, and metals from the interior to the coast would have been far more difficult.

(31.2) Why were large number of goods traded between India and other countries?

A large number of goods were traded because India had resources that foreign traders wanted in great quantity and bulk — especially pepper and malabathrum (possibly cinnamon), which the Periplus says were produced in quantity only in this region. In exchange, foreign traders brought coin, coral, glass, metals, and other items that were not locally available in the same abundance. This mutual demand for each other's specialised products drove the volume of trade.

(31.3) Give reasons for the development of bead-making industry at Kodumanal.

Two reasons stand out from the source and NCERT context:

• Kodumanal had access to precious and semi-precious stones, which were in high demand for export — the Periplus lists diamonds, sapphires, and transparent stones among exports. …

The Role of Rivers in Promoting Trade

Rivers were the arteries of ancient Indian commerce. In the context of the Periplus, rivers like the Periyar and the Bharathapuzha in the Malabar region connected the spice-rich interiors to the Arabian Sea. Traders used these waterways to move bulky goods such as pepper and timber from inland farms and forests down to the bustling port towns of Muziris and Tyndis. Without rivers, transporting such heavy cargo over land would have been slow and costly. Rivers also served as natural highways for smaller boats that ferried goods between coastal settlements, linking the entire western seaboard into a single trading network. In short, rivers made it possible for the “great quantity and bulk of pepper” mentioned in the text to reach the waiting Roman ships.

Why Large Quantities of Goods Were Traded

The scale of trade between India and other countries — especially the Roman Empire — was enormous because each region had something the other desperately wanted. From the Indian side, the text lists pepper, pearls, ivory, silk, diamonds, and sapphires. These were luxury goods with no close substitutes in the Mediterranean world. Roman demand for pepper was so intense that it was almost a currency in itself. From the Roman side, traders brought coin, coral, glass, copper, tin, and lead — items that India lacked or could not produce in sufficient quantity. This was not casual barter; it was a structured, high-volume exchange driven by complementary economies. The Roman Empire’s stable currency (gold and silver coins) made large-scale transactions easier, and Indian merchants were happy to accept these coins, which have been found in hoards across South India.

Reasons for the Bead-Making Industry at Kodumanal

Kodumanal, located in present-day Tamil Nadu near the Kaveri River, developed a specialised bead-making industry for three interconnected reasons. …