The three statements that describe convex lenses are:
A. They make the image of an object appear larger.
C. Light rays converge as they exit the lens.
F. They are thicker in the middle than at the ends.
Convex lenses are designed to focus light rays to a point, which is why they can make images appear larger and cause light rays to converge. Additionally, they are indeed thicker in the middle than at the edges.