Comprehension Passage
In the following passage some words have been deleted. Fill in the blanks with the help of the alternatives given. Select the most appropriate option for each blank.
The interior of the Earth has three chief layers. (1) ____ are known as the crust, the mantle and the core. There is a thick layer of soil (2) ______ the outer crust. It is found only in (3) _____ parts of the Earth. It consists of disintegrated rock and (4) ______ organic matter called humus. It is this soil which is indispensable for the plant (5) _____.
Select the most appropriate option to fill in blank No.2
1
to
2
for
3
in
4
on