Answer:
D. Feel-good/pleasure
I hope I helped!
Answer:
Hi! Well a population is a group of organisms that are the same species and live in the same area and they interact with each other! A community is where different populations of species live in the same area and interact with each other!
So the answer is population! Stay safe!! <3
A. The hosts body could reject the transplanted stem cells
<span>as animals get separated from each other, they soon start to adapt to the new environments which is called speciation</span>