... necessary to keep rivers clean (10 ) we don’t want to enjoy the benefits of the natural resources III Read the passage and answer the question below Man is a land animal, but he is also closely ... major things that the sea offers man are A fish and oil B minerals and oil C food, energy sources and minerals D ocean currents and waves The sea serves the needs of man as A it provides man ... important natural resources Many cities are on large rivers, and (1) every country has at least one river that plays an important part in the (2) of its people Besides transportation, rivers (3)...