Answer:
because that what helps farmers grow crops and that gives us food to be able to live
Explanation:
Psychology in its purest definition is the study of the human mind and it's functions, especially relating to human behavior.
Answer:480 ways
Explanation:
Given
There are 3-Volume series i.e.

No of ways in which they can be arranged in order is 2 i.e.
or 
For 2 volume series
There are two ways in which 2 volume series is arranged

Considering 3 volume books to be a single book denoted by a
and 2 volume books to be a single denoted by b
Thus we have to arrange a,b and 3 others books
No of ways in which 5 books can be arranged is 5!
also a and b can be arranged in two ways internally so
there are total of =
=480 ways
The answer to the question is d