The activity that evaluates public attitudes, changes policies and procedures in response to the public's requests, and executes a program of action and information to earn public understanding and acceptance is called:

Public Relations

Explanation:

Public relations is a planned communication process that puts up mutually beneficial relationships between organizations and their publics. Public relations is a practice of managing communication between an organization and its publics to cultivate a positive reputation, usually through publicity and other nonpaid forms of communication. These efforts may also include support of arts, charitable causes, education, sporting events.