A.I. Explanation:

Option 1: "Providing medical care to the elderly"

Explanation: This option is incorrect because the text does not mention providing medical care as part of the Healthy Horizons Initiative. Instead, the focus is on promoting active lifestyles and nutritional awareness, not direct medical services.

Option 2: "Offering free gym memberships"

Explanation: This option is incorrect because the text specifies that the initiative includes free fitness classes in community parks, not gym memberships. The emphasis is on community engagement rather than individual gym access.

Option 3: "Making health resources accessible to all community members"

Explanation: This option is correct as the text highlights that a key focus of the Healthy Horizons Initiative is to make health resources accessible to all community members, particularly emphasizing engagement with children and the elderly. This aligns directly with the main idea of enhancing public health through accessibility.

Option 4: "Increasing the number of parks in the community"

Explanation: This option is incorrect because the text does not mention increasing the number of parks. Instead, it refers to utilizing existing community parks for fitness classes, which does not imply an increase in park numbers.