Question

Which term best demonstrates when an organism is better adapted to the environment that they live in and are more likely to survive and reproduce? A) natural variation B) natural selection C) speciation D) living

Answer 1

I believe the answer is B: natural selection. 

Answer 2

The correct answer would be B) natural selection

Natural selection is the process by which nature selects or favors the survival and reproduction of the organisms which are better adapted to the environmental pressure such as changes in climate, predators, competition et cetera.

For example, the frequency of dark-colored peppered moth increases during the industrial revolution, development of long necks in giraffes to reach the food high in the trees et cetera.