I think the correct answer is C. Hope this helps.
Answer;
D. The birds have different mating seasons.
Explanation;
-Different species of birds have different mating or breeding seasons. Evolution has played a role in adjusting the timing of avian(birds) breeding seasons to maximize the number of young produced. The breeding season depends on a number of factors, for example In the temperate, subarctic, and arctic zones, the overriding factor is the availability of food. This varies across all different species of birds, irrespective of other similarities they may have.
Answer:
One focal point of the moon's orbit is 50,000 km.
controll is your awser you vary a factor to measure the results
True every living thing needs energy
