Which of these gives an example of the influence of location on what kinds of organisms can survive in a biome?

A. About 300 species of birds live in the taiga in the summer.
B. A person removes a cactus from a desert in Nevada and plants it in his yard in a nearby desert area.
C. A caribou that lives in a taiga ecosystem occasionally wanders north into the tundra.
D. A pine tree grows well in a taiga evergreen forest in Canada, while a barrel cactus grows well in a desert in Arizona.

Question

Which of these gives an example of the influence of location on what kinds of organisms can survive in a biome? 

A. About 300 species of birds live in the taiga in the summer.
B. A person removes a cactus from a desert in Nevada and plants it in his yard in a nearby desert area.
C. A caribou that lives in a taiga ecosystem occasionally wanders north into the tundra.
D. A pine tree grows well in a taiga evergreen forest in Canada, while a barrel cactus grows well in a desert in Arizona.