Q.Why do animals have greater diversification than plant diversity?

Step 1. The chapter's own species-discovery figures point toward this pattern: of the roughly 10-15 thousand new species identified and published worldwide each year, 75% are invertebrates — showing that the animal kingdom, and insects within it especially, continues to dominate newly documented biodiversity.

Step 2. A key structural reason is mobility: unlike plants, which are fixed in place once rooted, animals can actively move to find food, mates and shelter, which lets them colonise a much wider range of micro-habitats (aquatic, terrestrial, aerial, subterranean, parasitic) within the same broad region, each favouring slightly different adaptations and, over time, different species.

Step 3. Animals also generally show a wider range of feeding strategies (herbivore, carnivore, omnivore, parasite, filter-feeder and more) and behavioural/reproductive variety compared with plants' comparatively narrower set of nutritional strategies (mostly photosynthesis), and this behavioural and dietary specialisation itself drives further speciation as populations adapt to exploit distinct food sources. …

Reason from the chapter's species-discovery statistic (75% invertebrates) and general biological principles of mobility-driven niche exploitation to …

• Answering with an unsupported generalisation without connecting it to the chapter's own invertebrate-dominance statistic. …