It'd be D because twice the radius(16)would be the length of one side(32) and area for a square is side times side so it would be 1,024 ft^2
Hope that helped
Yes you can, for which one both?
Mostly its the tectonic plates that shift under us that causes earthquakes, how they shift changes the damage the earthquake can cause so tectonic plates unless u want the mythological one which is some earth god scratching his back
