Which human intervention would most likely protect and maintain kit fox populations

Protect grasslands and prairies from development

If humans stop hunting, stop overgrazing then the kit fox population can be protected.

Explanation:

As we know that human beings are considered as most intelligent species, so it is the duty of the human beings to protect the animals. Human can protect the animals by reduction in hunting, by planting more trees, by reducing pollution.

Previously kit fox was considered as endangered species but later in the year 1971 it was considered as threatened species as there was destruction in habitat. Due to livestock grazing, shrubs are being destroyed as a result there is fall in prey abundance and the kit foxes suffer due to lack of food.