Which is the best explanation for why you may not always be able to observe rocks transform from one type to another? a. most all rock is transformed beneath the surface of the earth. b. the transformation of rock happens slowly over a very long time period in the geologic time scale. c. most all rock is transformed by molten magma inside a volcano. d. the transformation of rock happens faster than we can observe

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.

do you have a picture?