What type of activity should be done alongside flexibility exercise?
a -- mental
b -- strength-building
c -- low-intensity
d -- baseline

The correct answer will be option--B

Explanation:

Flexibility exercise is a form of exercise performed to keep the body healthy and muscle flexible on a regular basis. Flexibility exercise helps muscles to stretch and remain flexible along with providing freedom to muscles to perform another exercise.  

Since the flexibility exercise does not help improve the strength and endurance of the muscle which is one of the goals of exercise to remain healthy, therefore, the exercise which involves the building of sreteghth exercise must be performed along with flexible exercise.

Thus, Option-B is the correct answer.

it means your tired?