Answer:
Thesis statement
Step-by-step explanation:
A thesis statement clearly states the topic of the paper and also includes the points being discussed in the essay that help prove the writers point.
This must be a thesis statement because it clearly states the essays topic (Americans should excersice)! And then the sentence says a list of reasons as to why they should excersice(to keep a healthy wieght and to reduce the risk of high blood pressure.)
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