Answer: If a decision was made to convert forest to agriculture then the example of negative trade off based on this decision will be plants and animals. Forest serves the animals with food and shelter and with the decision of shifting all the forests into agricultural land, the animals will have to migrate to another place. They will be diminished as a effect of this.
The forests provides area for a diversity of plants and trees and by converting the forest into agricultural land there will growth of only selective crops.