The Corona is the thinnest layer of the ☀.
It is closest to Antarctica
Explanation:
we can protect soil quality by the following ways:
1.plantation should be done.
2.chemicals should not be used.
3.using earthworm in the field as it makes the soil fertile
4.construction of dams should be made which prevents soil erosion.
hope u get it!
The answer is b because the other ones are involved in environmental science
