In particular, fresh leaves, fruits, berries, nuts, roots, and tubers are favorite foods seasonally, with insects and small mammals eaten when the opportunity arises. It's easy to see where bears have been. They frequently break the branches of nut-bearing trees while feeding and tear up the ground looking for insects, roots, or tubers. In desert environments, it's common to find partially eaten sotol plants where bears have been. Bears will also strip the bark from trees while looking for insects or juicy pulp, and will often rub themselves on rough bark.
Bears are smart.
They quickly learn how to get an easy meal. DON'T feed them or try to attract them in any way. If they become dependent on human handouts, this could mean more frequent contact with people and a greater chance of danger. A fed bear is a dead bear.