As a minister, being conscientious about the welfare of her parishioners, reverend douglas creates many roles in her church for retired church members. reverend douglas appears to be applying:

Reverend Douglas appears to be applying "activity theory."

Explanation:

When a person gets old, he will be active and stay healthy if he is socially active and maintain social interactions with others, this theory is known as activity theory. For this reason reverend Douglas creates many roles in his church for retired members. Older adults stay happy in this way.