In the following question, out of the given four alternatives, select the alternative which best expresses the meaning of the Idiom/Phrase.

To keep an eye on

To watch over closely

The idiom "to keep an eye on" means to watch over closely. So the answer is (3).

The other options do not fit the meaning of the idiom.

• To be able to understand everything means to have a comprehensive knowledge of something.
• To see someone in a bad light means to have a negative opinion of someone.
• To keep distance from someone means to avoid interacting with them.