The best response is: The author’s central idea is that the lack of representation of people with disabilities leaves science worse off. The last paragraph gives reasons that people with disabilities are needed in science—because they have tremendous innovative capacities.
This response effectively captures the central idea of the piece and explains how the last paragraph enhances that idea by highlighting the valuable contributions that people with disabilities can make to the field of science. This addition reinforces the argument that their exclusion is detrimental to scientific progress.