Please see the work below.
Work Step by Step
We know that the insulation effect of fiber glass is due to the low thermal conductivity of air trapped between the glass fibers. Thus, option "c" is the right option.
You can help us out by revising, improving and updating this answer.Update this answer
After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.