Answer:

b. intensity

Explanation:

hope it helps

Answer:

refers to the difficulty level of workout.

A. time

B. intensity

C. frequency

D. types

Intensity - (how hard) Intensity refers to the rate at which the activity is being performed or the magnitude of the effort required to perform an activity or exercise. It can be thought of "How hard a person works to do the activity".

B. intensity

Hope it Help