Emil Kraepelin is best known for his contributions to the study of schizophrenia. He introduced two new diagnostic categories of disordered behavior - dementia praecox and manic-depressive insanity - based on symptom differentiation, , and .

false because ozone (o3) depletion does not cause global warming, but both of these environmental problems have a common cause: human activities that release pollutants into the atmosphere altering it.

global warming is caused primarily by putting too much carbon dioxide into the atmosphere when coal, oil, and natural gas are burned to generate electricity or to run our cars.

explanation:

b. to discover aspects of the natural world.

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i am sorry but i need more information and a picture.