Answer:
People who are on the low end of the healthy weight scale have fewer health concerns.
Step-by-step explanation:
This is the sentence that would work best as a thesis statement. This sentence provides a clear idea that is broad enough to be interesting to many readers but narrow enough that it can be addressed in an essay. Moreover, the statement does not provide an opinion, but a fact, which means that evidence can be provided for it in the rest of the essay in order to persuade the audience. Finally, the statement does not exhibit personal bias.