Question

How does the central idea support the overall argument expressed in the controlling idea​

Answer 1

A controlling idea defines the parameters of a paper. It keeps you from veering off on tangents; it saves you from having to talk about various sub-topics, placing them beyond the scope of the text being written.

The central idea is a starting point for the paper. It is a statement which distills the overall point of the paper.

Answer 2

It establishes the idea that women are not the only ones who benefit from equal education.