In dry regions the leaf size of a tree becomes smaller It is so to........

Environment and Ecology Biodiversity

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In dry regions, the leaf size of a tree becomes smaller. It is so to

Reduce metabolism

Reduce transpiration

maintain natural growth

Protect plant from animals

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Explanation:

In dry regions, the leaf size of a tree becomes smaller. It is so to reduce transpiration.Second option is correct.
Transpiration is the process by which moisture is carried through plants from roots to small pores on the underside of leaves, where it changes to vapour and is released to the atmosphere. Transpiration is essentially evaporation of water from plant leaves.
So, in dry regions where there is scarcity of water leaf size becomes smaller so that the portion exposed to the sun is lesser and transpiration is lesser.