Final answer:
This response provides definitions for the terms provided in the question regarding the legislative process in the US Congress.
Step-by-step explanation:
1. Version: a form or variation of the original.
2. Conference: a meeting for discussion.
3. Roll call vote: a bill that will not be in progress or in any action but will be inactive for a particular period.
4. Floor action: a voting process by the members who are present; no absentee voting allowed.
5. Sit activity concerning a bill which may include debates and compromises.
6. "In session": the time when Congress is active and members are present, fulfilling their respective duties.