Make the same population as taking up space? Yes. Will they do the sane thing? No. Each of them have their niche and if one isn't there then one will be messed up.
Answer:
A. As a young naturalist, Charles Darwin traveled around the world and made many discoveries on a small British navy ship, HMS Beagle.
The answer is D. Offspring, because that is the product of this instinctual ritual, to keep their species continuing.
no they are not exercising for the fun of it
they are not making mating calls because they have the feet and have probably already met the female.
and no he isn't going to eat her