Question

what does it mean to focus?
to think about numerous things at once.
to stress about things out of your control.
to put your energy and thoughts into one thing.
to do things you enjoy doing.

Explanation:

Focusing is the act of concentrating one's mental and physical resources on a single task or object. Thinking about many things at once is the opposite of focus. Stressing about out - of - control things is not related to the core concept of focus. Doing things one enjoys is not the definition of focus. Putting energy and thoughts into one thing aligns with the concept of focus.

Answer:

To put your energy and thoughts into one thing.