Pls help me if good at science I’ll mark brainliest remember I need two answer

Are the earth's ocean floor and continents the same age geologically? why or why not?

Explain how the number of similarities between the embryos from early stage to late stage is used as evidence of a common ancestry

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?