Answer: Approves
Step-by-step explanation:
Verbs in a sentence should agree with the subject that is acting them out. This means that if the subject is singular, the verb must be singular and if the subject is plural, the verb must be plural as well.
Committee is a singular subject and so must get a singular verb which is ''approves''. Were it to be ''Committees'', the verb would be ''approve'' which is plural.