Vestigial structures are taken as an example of evolution because they give us an indication of structures that, due to the adaptation to the environment, disappeared.
At the end of the vertebral column, we have the coccyx as an example of this. Its believed that it could have formed a tail and currently, is only a small bone without any specific function, even some individuals are born without it.
Answer:
desire (libido), arousal (excitement), orgasm and resolution.
Explanation:
The sexual response cycle has four phases: desire (libido), arousal (excitement), orgasm and resolution.
The correct answer to this question is (a.) in the upper part, nearer the horse's body. A horse would be able to run faster if most of the mass (horse's mass) in its legs were concentrated in the upper part where its is nearer to the horse's body.