Congressional leaders form committees when they want to take up an issue that falls between the jurisdiction of existing committees, to highlight an issue, or to investigate a particular problem.

select

Explanation:

The term being described in the question is known as a select committee. Like mentioned, this is a committee made up of a few individual parliamentary members who are chosen by the Congressional leaders, specifically appointed in order to deal with particular areas or issues originating in the Westminster system of parliamentary democracy. This select committee publishes all of their findings in a report for the government to look over and respond to the recommendations made by the committee regarding the topics.

can you explain a little further maybe give multiple choice? ?