A lack of social relationships may affect physical health and life span as dramatically as smoking or a lack of physical activity.

statement is true

Explanation:

The lack of social relationships, as well as the complete withdrawal from social life, has demonstrated to have negative effects on the overall health of individuals.

In general an active involvement in social activities tends to lessen the risk of premature death. The explanations vary on how the effect of being in touch with people is directly linked to health.

Emotional, psychological and physical health are all aspects that tend to get better as people have good relationships, although in some cases the negative interactions resulting from them can also lead to some significant diseases product of stress.

The isolation that occurs in prisons of maximum security has consistently shown this effect.

The lack of social relationships will damage health and shorten life span just as would any harming activity like smoking or lack of sports will do.