What term includes all the biotic and abiotic elements in an area?

The negative impacts of nonnative species generally outweigh the positive impacts

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?

To confirm when to exclude children from school it’s recommended that you refer to guidelines from which of the following organizations