The correct answer is option B, that is, using the land to create a national park.
National parks refer to big areas of public land set aside for the native animals, plants, and the habitats in which they thrive. The national parks safeguard the places of natural beauty and are home to various endemic species.
National parks are in real sense safeguarded regions, conserving biodiversity is the central aim for such protected areas. The national parks offer a safe home for the local animals and plant species, they also help in keeping the water and air clean.