Q.Arrange the correct sequence of ecological hierarchy starting from lower to higher level.

Step 1. The accepted ecological hierarchy, lowest to highest, is: Individual organism → Population → Community → Ecosystem → Landscape → Biome → Biosphere.

Step 2. Check each option against this order. (a) 'Individual organism → Population Landscape → Ecosystem' jumps straight from Population to Landscape, skipping Community and Ecosystem, and then places Ecosystem after Landscape — wrong order. (b) 'Landscape → Ecosystem → Biome → Biosphere' places Landscape before Ecosystem, but Ecosystem is actually the lower level — wrong order. (c) 'Community → Ecosystem → Landscape → Biome' follows Community, then Ecosystem, then Landscape, then Biome — exactly the correct ascending sequence. (d) 'Population → organism → Biome → Landscape' reverses Population and organism, and also places Biome before Landscape — wrong on two counts.

Step 3. Only option (c) preserves the correct relative order of all four levels it lists.

Compare each option's listed order against the accepted hierarchy: Individual → Population → Community → Ecosystem → Landscape → Biome → Biosphere.

• Assuming the option that starts with 'Individual organism' must be correct without checking the rest of its sequence.
• Confusing Landscape and Ecosystem's relative rank — Ecosystem sits below Landscape in this hierarchy.