What happens to most of the energy as we move up trophic levels

Awater molecule is polar because there is an uneven distribution of these between the oxygen and hydrogen atoms.

Nucleic acid certain protein cell membranes certain carbohydrates

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?