Final answer:
Select committees are temporary committees formed in the House or Senate to address specific issues not covered by standing committees.
Step-by-step explanation:
Select committees are temporarily set up by the House and Senate to deal with a specific issue that is not covered by a standing committee. These committees often conduct special investigations or address topics like aging or ethics. Unlike standing committees, which are permanent fixtures, select committees are formed to address a particular issue and discontinued after their task is completed. The use of these select committees enables the Congress to handle the vast array of issues that require specialized attention beyond the scope of standing committees.