Question

2. Why is it said thot - ?
(a) The ozone layer is a protective
shell of the earth
(b) Water is life
(c) Seawater is useful even though it is
not potable
​

Answer 1

Answer:

The ozone layer protects Earth from the Sun's harmful ultraviolet rays that shine to Earth. It also lets a few rays in.

Without water, the human body cannot work. Plants and animals also need water to make their body work.

Sorry, but I cannot answer the third one.