Suporting details gives you? a. somthing to fill in the blank areas of the photogragh b. more information about the subject c. a way to color balance the subject d. a way to compare the size of the subject to the rest of the paragraph

The answer is option B "more information about the subject." Supporting details are used to support your argument in your essay, so you have more faces, and information in order to make a strong argument. Supporting details do indeed make your paragraph bigger but that's not the reason why they are used. Supporting details help you prove your claim and defend your argument against people who think the opposite way of your claim.

Hope this helps!

a study funded by private corporations refuting global warming

(because i need 20 chars)