Pretty sure the answer is B. Hunting, as this will dwindle the population of elk.
The theory of Continental Dift
So... for the element of PHOSPHORUS, you already know that the atomic number tells you the number of electrons. That means there are 15 electrons in a Phosphorus atom. Looking at the picture, you can see there are two electrons in shell one, eight in shell two, and five in shell three.
I believe the answer is A. decomposition ans parasitism
The answer is D. All of the choices pertain to living organisms