Answer:
C
Explanation:
it builds up higher level of oxygen in the bloof
The answer is「Atomic Numbers」
DDT was used during second world war to control malaria among the troops and the civilians. Later, it was used as pesticide in agricultural and household practices. Due to its excessive use it entered into the food chain and its amount in the food crossed the permissible level. So, it was banned by United States.
Removing the oxygen in water
humans do not have gills as fish do but human embryos have gill slits suggesting fish and humans have a common evolutionary ancestor