Why are a variety of instruments needed to measure change in the climate system?
a. A different type of instrument is needed for each different climate.
b. The climate system involves a number of different factors that are measured differently.
Climate is determined over a number of years, rather than a short period of time.
d. Different areas have developed different instruments to measure climate change.

answer; ///i do believe that the correct answer is (c) hold atoms together to form compound;

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.

the answer is d. exposing corruption in the church