Answer:
Committees manage a bill's passage and make any needed changes.
Step-by-step explanation:
The lawmaking function on the other hand is more closely related to creating the law that represent the party which appointed the senate. (such lower taxation rate for republican party or higher taxation rate for democratic party).
Senate's role committee work is more closely related to the actualization of the bill (such as whether they government have enough fund or employees to implement the law. If not, then the changes will be made to the bill.)