Based on your hypothesis, which population(s) would be hurt if bears were added?

The correct answer would be - plants, and small animals like moose, rodents, deer and others as bears are omnivorous animals.

Explanation:

In any forest ecosystem, mostly in the forest ecosystem, beers depend on various kinds of animals and plants for their nutrition and energy. They depend on plants that are rich in berries, fruits, and flesh roots. Beers also eat small animals such as rodents, fishes, and hoofed animals.

Therefore, an increase in the number of beers in any ecosystem will lead to  a decrease in the population of these organisms and their population including plants.