Activities that reduce muscle tension and stress in the body by concentrated use of the mind are called: a
risk factors.
b
relaxation techniques.
c
rationalization techniques.
d
stressor.

b. relaxation techniques

Explanation:

"Relaxation techniques" are part of stress management, therefore, they are meant to reduce stress in the body. They are very important especially when a person is facing many troubles in life. It allows him to reduce his muscle tension, lower his heart rate and blood pressure, aid in his digestion, decrease his level of fatigue, improves his sleeping pattern, etc. It also prevents anxiety through "mindful meditation" or using the mind for guided imagery.

It is definitely not a "stressor" or something that causes stress. This makes choice d incorrect. It doesn't increase any form of risk, thus, it is not a risk factor. This makes choice a incorrect. It doesn't justify anything through reason, therefore, choice c is incorrect.