Please help me from 2 to 15 and help me with the exercises b too please

Comparing and contrasting is a form of

Is expression of words or ideas opposed to what is literally meant or expected called.

The voussoirs rest on the centering until the keystone is wedged into place. at that point, the centering can be dismantled. what does the word dismantled mean? a. to take apart b. to put together c. to cover d. to lift up