Question

2) Natural substances and Man-made substances.
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Answer 1

Answer:

Man-made materials are typically much more durable than their natural counterparts. ... Natural materials, however, have a shorter lifespan, because these materials were once alive and so gradually perish over time.

Answer 2

Answer:

natural substances are those which are created by nature e.g,trees,humans,etc while those things which are made by man are called man made things e.g, bricks,houses ,etc.