Answer:
B. intensity of an activity
Explanation:
The talk test is used to measure and monitor the intensity of a physical activity.
This test is very simple, no equipment and no other technology is used to measure intensity, because this test evaluates the intensity of the exercise by observing your ability to speak and breathe during practice.
If you can talk and breathe satisfactorily at the same time, then the intensity of your exercise is at the right level.
