Please help me I needed to turn this in yesterday

Which statement correctly describes a way that mutations increase the likelihood that a species will survive in a changing environment

Question#29: why does the tropical ocean have a greater temperature range than the temperate ocean?

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?