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Is a cheetahs speed considered genetic variation? If so, what mechanisms would explain this variation?

Yes the speed of cheetah is considered a genetic variation.

Explanation:

A cheetah named Chewbaaka's genome has been sequenced and found that 11 genes have undergone mutations over generations to provide the speed to cheetah.

The changes in genes over a period of time in several generations caused genetic variation in the cheetah and natural selection leading to its evolution to fast runner.

parasites can detrimentally affect their host, but also must not allow their host to die before they can complete their life cycle. some parasites have complex life cycles with many different hosts, and have had to find ways of persisting in many different environments during the change from one host to another. ectoparasites live outside the body of the host, and can more easily  disperse, but are  more exposed to predators, parasites, parasitoids. endoparasites live inside the body of the host, and are therefore protected from the outside environment. but they can be  attacked by the host's immune system. they have therefore developed  mechanisms for dispersal such as  complex life cycles.