1.
Option B
2.
Materials can be hard, soft, tough, strong, weak, heavy, tough, bendy etc.
3.
Wood is an organic material, a natural composite of cellulose fibres embedded in a matrix of lignin which resists compression.
4.
Option A
5.
Option D
6.
Option A
7.
Option A
8.
Option B
9.
Option C
10.
Option A
11.
Our surrounding is made of material.
12.
Option B
13.
Houses are made of bricks because it is heavy.
14.
Sweater is made of wool because it is warm.
15.
Option A
16.
Option A
17.
Option D
18.
Plastic, glass, cement, steel etc are artificial materials.
19.
Option D
20.
Option A