Two groups of snails live close to each other on the coast of Spain. One group lives in cold water on the lower shores. The lower coast and the snails are protected from large changes in temperatures. The other group of snails lives on the upper shores. The upper shore and the snails that live there are exposed to daily changes in temperature. These two groups of snail are examples of
A) how organisms adapt to their environments.
B) how organisms fight each other for survival.
C) why organisms must move to new environments.
D) why organisms die out when temperatures change.