Read the following paragraph from the section "What Influences Fertility?" In the past, fertility rates of 4.5 to seven children per woman were common. High mortality rates of young people kept population growth low. As health care and medicine improved, the population growth rate began to soar. It only flattened out as the fertility rate declined toward two children per woman.
How does this paragraph support the MAIN idea of the article?

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voluntary muscles are controlled by the cerebellum.

the correct answer is option d.

an appositive is a noun, noun phrase or noun clause which follows another noun or noun phrase in order to describe it or name it another way. they are usually used between commas, brackets or dashes.

the example sentence with the correct use of commas is the following:

her uncle, the man over there in the red shirt, owns the hardware store in town.