Answer:
Lucid dream
Explanation:
A lucid dream is a dream that happens during consciousnesses. This dream could happen when a person is in the REM stage. It is also called a dream stage of sleep. About 55% of people have a lucid dream in their lifetime. It is the form of meta-cognition or we can say that it is the form of awareness within awareness.
There is some technique through which a person can notice their lucid dream.