Write the diffetence between scalar and vector quantitise

Competition occurs between species when

Cells destroy body cells infected by a virus or bacteria. killer t t memory t none of the above

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?