Answer:
Rachel Carson was an American biologist well known for her writings on environmental pollution and the natural history of the sea. Her book, Silent Spring (1962), became one of the most influential books in the modern environmental movement and provided the impetus for tighter control of pesticides, including DDT.
Carson early developed a deep interest in the natural world. She entered Pennsylvania College for Women with the intention of becoming a writer but soon changed her major field of study from English to biology. After taking a bachelor’s degree in 1929, she did graduate work at Johns Hopkins University (M.A., 1932) and in 1931 joined the faculty of the University of Maryland, where she taught for five years. From 1929 to 1936 she also taught in the Johns Hopkins summer school and pursued postgraduate studies at the Marine Biological Laboratory in Woods Hole, Massachusetts.
She appeals to authority because she uses Elton's name. She did not use him or say "a man said..." This could cause the reader to look him up and learn more about him. Her statistics strengthen her case.
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