Question

Give reasons:
3. Large-size suitcases are fitted with wheels
b. The worn-out tyres should be discarded.
c. If you try to hold a glass with soapy hands, it can slip
th
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Answer 1

Explanation:

The earth has four principal biological systems. These are: fisheries, forests, grasslands and croplands. They form the basis of the world's economic system. They supply us food and raw materials for industry.