In which stage has an individual changed their behavior for six or more months? They now focus on not reverting back to their old habit. Pre-contemplation Stage
Preparation Stage
Action Stage
Maintenance Stage

Maintenance Stage

Explanation:

Maintenance - In this stage, people have sustained their behavior change for a while (defined as more than 6 months) and intend to maintain the behavior change going forward. People in this stage work to prevent relapse to earlier stages

I Hope This Helped !

right angles are formed by perpendicular lines. if the lines would extend, to make two intersecting lines, they would form four right angles.

a. the man as a ruler