Final answer:
The activity that encompasses acquiring and maintaining clients and increasing a hospital's community presence is marketing. Marketing is crucial for healthcare institutions to foster community relationships, heighten visibility, and effectively communicate their services.
Step-by-step explanation:
The activity that includes all necessary actions to obtain and retain clients while enhancing the awareness and standing of the hospital in the community is c) Marketing. Marketing strategies in healthcare are essential for building relationships with the community, increasing the hospital's visibility, and communicating the services and specialties available to potential patients. Effective marketing efforts can result in a stronger reputation and increased patient loyalty, which are crucial for the hospital's success.