2. Answer the following questions,
(a) Why did the need for man-made
materials arise?
(b) Which are the natural materials
obtained from plants and
animals?
(c) What is vulcanization?
(d) Which natural materials are used
ohtain libres
Share
2. Answer the following questions,
(a) Why did the need for man-made
materials arise?
(b) Which are the natural materials
obtained from plants and
animals?
(c) What is vulcanization?
(d) Which natural materials are used
ohtain libres
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Answer:
because the need of man made hojse jsbdhn jdhfjne uaBend jeyydhehdh ghsbsBusndn