What do the Andes and Rockies have in common? (Select all that apply.)

a.) The Andes and Rockies are both located in South America.

b.) The Andes and Rockies are both formed by uplift from the Earth’s crust.

c.) The Andes and Rockies both have a delicate balance of biotic and abiotic factors.

d.) The Andes and the Rockies both have several different ecosystems at different elevations.