What is the relationship between congressional terms and sessions

A term of Congress is two years long and begins on January 3 of each odd-numbered year. Each Member of the U.S. House of Representatives is elected to serve for one term at a time, and may be elected later to serve additional terms. A session of Congress is one year long.

honestly i really it keep confusion down on some sides

c) troops march forward in close formation against newer, more accurate weapons