The CDC focuses national attention on developing and applying disease control and prevention
w researches and provides information on non-infectious diseases
leads outbreak investigations
treats disease
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the answer is c cumulus. cumulus clouds can be seen on a gray and rainy day, because cumulus clouds create thunderstorms. give me brainliest if right.

only about ten percent of the energy at one trophic level is passed on to organisms at the next trophic level. the remainder of the energy is used in life processes or lost as heat.