Question

1. part a: which statement best explains why the grandmother compares roots in words to roots in math?

to demonstrate that prefixes are more important than roots
to prove that vocabulary is harder than math
to explain that both have a base that determines meaning
to show that both require complicated equations

Explanation:

In language, word - roots are the base of words and carry core meaning. In math, roots are also fundamental to understanding equations and values. The comparison is likely to show that both have a base that determines meaning.

Answer:

To explain that both have a base that determines meaning