Answer:
(B)standard of living thing
Explanation:
C
A) They were treated as equals
B. New Stone Age
The benefit of physical environment to man are:
1.)It has provided us food,water shelter etc.
2.)It has also provided us air to survive.
3.)It has provided good view of nature,which hepls us to be free from strees.
Hope its helpful!
The right answer is C.