I'm not sure about number 1 or number 6, but I know that 3 is nucleic acid and 5 is solution.
Answer:
This phenomenon is called Niche Differentiation, it happens when several species live in the same area but different parts. Hope that helps! :)
Answer: C. Oil from the oil spill could enter aquatic organisms, like fish, which could make people sick.
Explanation:
Oil spill in water body can be caused by the industrial oil discharge, emission of vehicle oil in water body.
The oil may contain toxic chemicals which could be consumed by the fishes or other aquatic organisms. The fishes and other edible aquatic organisms if consumed by human beings can make people unhealthy or sick.