The Borg Scale uses a perceived exertion rating of A. 100-200
B. 1-10
C. 6-20
D. 15-30

These include a rating of 6 perceiving “no exertion at all” to 20 perceiving a “maximal exertion” of effort. Practitioners generally agree that perceived exertion ratings between 12 to 14 on the Borg Scale suggests that physical activity is being performed at a moderate level of intensity.

When would you use the Borg Scale?

To measure your training progress, use the Borg Scale to gauge how much effort it takes to perform a certain workout or activity. As your fitness improves, your RPE for that activity will decrease, a sign you can make your workout more challenging

i think the answer is strength

it should be