Trevor, an aggressive child, had problems in elementary school, as he would frequently fight with other children. Trevor found when he entered high school that he could channel his hostility into sports such as football and rugby. This is an example of what mechanism?

by using  production possibilities graph.  opportunity costs are key expenses in financial matters and are utilized as a part of registering money saving advantage investigation of a venture. such expenses, be that as it may, are not recorded in the record books but rather are perceived in basic leadership by processing the money costs and their subsequent benefit or misfortune.