Which situation would be part of the normal reproductive cycle of a human?

The answer is when the presence of testosterone regulating gamete production in a male.  Hormones is the one who regulated by the human reproductive system. The human female reproductive system adapted for the transport of oxygen through a placenta to a fetus. Reproduction is part of the structure c of the body system.

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clumped distribution, because you'de have all of the population gathered in a relatively small are.

it's the most common because it provides protection and a mate for reproduction

example: humans, seeweed, cattles, etc.