What best explains the variation in tree heights in the tropical rain forest?
grazing patterns of herbivores

competition for light and moisture

fewer nutrients are available to the shorter
trees

O
the intense heat causes the trees to be
shorter than similar trees in other biomes
CLEARAN

An ecologist studied the same species of deer during the summer and the winter. she noticed that during the summer, when there was plenty of food, the deer were energetic and playful. however, during winter when food was scarce, the deer moved more slowly and did not run unless they needed to escape a predator. which scientific fact is best supported by her observations?