A.I. Explanation:

Option 1: "To engage in activities and practice responsible tourism."

Explanation: The text highlights that visitors can engage in various activities such as hiking and bird watching while also emphasizing the importance of responsible tourism practices. This aligns directly with the main idea of the guide, which encourages both enjoyment of nature and the preservation of the environment.

Option 2: "To participate in competitive sports events."

Explanation: This option is incorrect because the text does not mention competitive sports events at all. Instead, it focuses on activities like hiking and bird watching, which are not competitive in nature.

Option 3: "To collect natural souvenirs from the parks."

Explanation: The text does not support the idea of collecting souvenirs. In fact, it promotes responsible tourism practices, which would discourage actions that could harm the ecosystem, such as collecting items from nature.

Option 4: "To feed and interact closely with wildlife."

Explanation: This option is incorrect as the text does not advocate for feeding or closely interacting with wildlife. It emphasizes responsible practices, which typically include avoiding direct interaction with wildlife to protect both the animals and their habitats.