Caspian Sea is what I got
Answer:
A. puts lives and property at risk
Explanation:
Because Earth Sciences covers a lot of ground (pun intended) and nobody has the time or ability to do everything well and thouroughly. The field is very highly specialized in its subdivisions.
B is the correct answer. Because A and D are pull factors that bring people in from other places. C is not that crucial and it won't affect the living conditions of a person and that is why B is the correct answer.