Select the most appropriate phrase for the underlined segment in the given sentence.

They are rivals and cannot work together in harmony.

Pull together

The most appropriate phrase to replace the underlined segment in the given sentence is (4) Pull together.

The phrase "pull together" means to work together in a coordinated and cooperative way. It is often used to describe people who are working towards a common goal.

In the given sentence, the speaker is saying that the two people are rivals and cannot work together in a coordinated and cooperative way.

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

• Potter about means to do something in a leisurely or aimless way.
• Make up means to put two things together to form a whole.
• Put down means to criticize or belittle someone.