Choose the correct alternative.

a) The part of the eye that focuses is called
iris.
lens.

b) When we look at an object close to us, the image needs to be focused
a lot.
a little.

c) A lens that focuses a lot is like a magnifying glass, that is
convex.
flat.

d) When we look at an object close to us, the ciliary muscles of the eye
are at rest.
contract.