To improve the introduction of his essay, the sentence that Reese should add before sentence 1 to create a more effective introduction is:
C. Over the past centuries, many of the mysteries of the human body have been explained by science.
- The very first line is Reese' introduction is: "But there is still one part of the human body that confuses scientists: the brain."
- The sentence above begins with the conjunction "but". "But" is used to indicate contrast between two ideas.
- That means the sentence that must be placed before that one should convey a different, contrasting, or even opposite idea.
- Reese mentions that the brain still confuses scientists. Thus, the sentence that we must add should talk about the opposite idea - scientists figuring things out.
- That is why letter C is the correct option. This is how the two sentences go together:
"Over the past centuries, many of the mysteries of the human body have been explained by science. But there is still one part of the human body that confuses scientists: the brain."
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https://brainly.com/question/14386281
