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Answers
a. Desert are most common in western margin of the continents in the tropics because the prevailing winds in the tropics and tropical easterly wind . the tropical easterly wind become dry by the time they reach the western margin of the contents and so they bring no rainfall.
b. veild are blessed rich natural resources . mining is one of the main economic activity in the veild . apart from mining sheep rearing , dairy farming is also a major economics activity in that reason. since the land is not that fertile the veilds , agriculture is not practised extensively. however, part where land is fertile , crops are cultivated in this reason.
c.1 because they generally draw in carbon dioxide and breathe out oxygen.but the amount of carbon dioxide they observe and produce .
c.2 Mediterranean trees adopt themselves to dry summer with the help of their thick barke and vax coated leaves which help them reduse transpiration.
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