D. Ecosystems
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It sets the mood for the scene or part of the story you are currently engaged in, it draws you into the book by having you feel how the author wants you to feel at that moment in the story.
1.C 2.D 3.B. 4.A btw im right
A. memoir
A memoir is similar to an account or record and is written based on information. A journal on the other hand contains personal accounts along with one's opinions and thoughts. An essay is far more detailed and a manual contains information along with instructions.