74. Which of the following is an example of a positive feedback
mechanism in the climate system of Earth?
(A) Global warming causes extreme weather, including severe
thunderstorms.
(B) Higher global temperatures cause sea levels to rise.
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(C) Higher ocean temperatures lead to an increase in the numbers of
tropical fish found off the coast of Florida.
(D) Higher global temperatures cause the polar ice caps, which
reflect sunlight back into space, to melt, leading to further global
warming.
e following information for Questions 575 through 578.