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

a) a pine tree grows well in a taiga evergreen forest in canada, while a barrel cactus grows well in a desert in arizona.

b) a caribou that lives in a taiga ecosystem occasionally wanders north into the tundra.

c) about 300 species of birds live in the taiga in the summer.

d) a person removes a cactus from a desert in nevada and plants it in his yard in a nearby desert area.