Select the most appropriate option to fill in the blank and make a grammatically correct sentence.

A babysitter is somebody who looks ________ other people’s children.

after

The most appropriate option to fill in the blank is after.

A babysitter is someone who looks after other people's children. This is the most appropriate word because it accurately describes the role of a babysitter, which is to take care of children while their parents are away.

The other options are not as appropriate.

• For means intended for or used for a particular purpose. It does not make sense in the context of the sentence, because the babysitter is not intended for or used for other people's children.
• On means in contact with or supported by something. It does not make sense in the context of the sentence, because the babysitter is not in contact with or supported by other people's children.
• Over means above or across something. It does not make sense in the context of the sentence, because the babysitter is not above or across other people's children.