ason is traveling to a dry desert. He knows that cactuses hold water and was told that desert animals do not eat the cactuses for food or water. What is the best explanation of why the cactuses are not eaten by animals?

The stem makes a cactus too tall for predators to eat.
The spines protect the cactus from predators eating it.
Animals do not eat plants for food or water.
A cactus stores its water in its roots far away from predators.