"What can they do about it?" is a common Engpsh expression used to ask about the possible actions or solutions for a particular situation or problem.

This expression is a shortened form of "What can be done about it?" and is used when someone wants to know what steps can be taken to address a certain issue.

Here are some example sentences:

What can they do about the rising cost of pving?
What can they do to stop the spread of the virus?
What can they do to improve the education system?

In each of these examples, the speaker is asking about possible solutions or actions that can be taken to address the issue mentioned.