What was rachel carson’s contribution to conservation sciences?

Used writing and her testimony before the U.S. Congress to help promote a new environmental ethic.

Explanation:

Rachel Carson is a marine conservationist, biologist and American writer who, through her books, highlighted the danger of using various pesticides for marine life. His research and activism allowed the prohibition of the use of DDT and other pesticides and the creation of the U.S. Environmental Protection Agency.

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the answer is: c. c.it limited the president’s power to start wars.

the war powers resolution of 1973 requires the president to notify the congress whenever the president wanted to order a military operation to other countries within 48 hours. if after being reviewed the congress disagree with the proposal, that the president will be banned from ordering the operation.