Passage

Habits form when a cue triggers a repeated action that produces a rewarding result. Over time, the connection between cue and action becomes more automatic.

Best Summary

Repeated rewarded actions following the same cue gradually become automatic habits.

Solution

1. The passage explains the cue-action-reward process.
2. Its conclusion is that repetition makes the response automatic.
3. The summary compresses the process without dropping its central mechanism.