Respuesta :
The statement that best summaries the central idea of this passage is, Dalgard sees clinical signs of depression and illness in the monkeys.
What is central idea?
Central idea is the main idea of a passage, which unifies the elements of a story or a passage.
Because Dalgard said, pointing to a monkey, that he is confident and can tell when a monkey is getting sick. And they get a little bit depressed, they go off their feed, and in a day or two they are dead. These clinical signs by Dalgard summaries the central idea of the passage as central idea means the main idea of the passage. A central idea in a passage unifies the elements of a story.
Hence the correct option is, Dalgard sees clinical signs of depression and illness in the monkeys.
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