Question

in the tragedy of the commons scenario, why does each rancher have an incentive to add more and more cattle?
to comply with government regulations
to maintain the quality of the pasture
to ruin the environment for future use
to increase their own short - term profit

Explanation:

In the Tragedy of the Commons, individuals (ranchers here) act in self - interest. Adding more cattle gives a rancher more livestock to potentially sell or use, which increases their short - term profit. Complying with government regulations would not lead to overgrazing. Maintaining pasture quality would mean not overgrazing. Ruining the environment for future use is not the intended goal of individual ranchers; they are focused on their own immediate gain. So the incentive is to increase their own short - term profit.

Answer:

to increase their own short - term profit