1.
Because of growing industrialization and urbanization in recent times.
2.
Option A
3.
tonic
4.
1972
5.
Option A
6.
Human beings utilize the vegetation and wild life. The greed of human beings leads to over utilization of these resources. They cut the trees and kill the animals creating ecological imbalance. As a result some of the plants and animals have reached the verge of extinction.
7.
Option B
8.
Royal Bengal tiger, turtles, crocodiles, gharials and snakes.
9.
Option A
10.
10 to 19
11.
Option A
12.
821
13.
6.9
14.
Option B
15.
Because these groups are not producers.
16.
Option A
17.
Option A
18.
It is used for controlling diabetes.
19.
Safe drinking water
20.
Coniferous trees like pine, deodar, silver fir, spruce and cedar.
