Why does the author provide statistics in paragraph 3?

The statistics show how many people aren't vaccinating their children.
A doctor provided the statistics to help the writer prove her point.
Readers would recognize how many people vaccinate their children.
Statistics convince readers because statistics are emotional.

The statistics show how many people aren't vaccinating their children.

Explanation:

Statistics aren't provided specifically to writers by doctors, they come from whatever reports the writer chooses to use, so that rules out choice 2.

I assume the passage is making a point about how vaccines should be trusted and the anti-vax movement is detrimental, so choice 3 would prove the opposite point.

Statistics are logical, not emotional, so choice 4 is out.

Therefore, choice 1 is the only logical answer.

(I can't be completely sure of this answer without seeing the actual paragraph- I could be wrongly assuming the point that the author is trying to make. If they are trying to prove that vaccines are widely used, then the answer is choice 3. However, that doesn't seem like a very argumentative point to me, so I assumed that they were trying to prove that vaccines need to be used more, making the answer choice 1.)

c. explains words’ origins and variations.