During the fall, squirrels store food to prepare for winter. which of the following changes in the environment during the winter most likely causes squirrels to do this?
a. squirrels need to eat more during the winter in order to maintain their body temperature.
b. squirrels cannot leave their dens during the winter because they lose most of their fur.
c. many plants go dormant during the winter, which diminishes the squirrels' food supply.
d. much of the ground is covered in snow during the winter, which makes food harder to find.