Every time alice cleans her room properly and makes the bed, she receives a marble. when she accumulates 100 marbles, she can get the new video game she wants. what type of behavioral program are alice's parents using? a. token economy b. negative reinforcement c. modeling d. systematic desensitization

this statement is true.

forests are public goods, available for everybody. when usage of such a good becomes interesting for consumers and its usage increases, there can be a risk of overexploitation. it is a non rival good therefore, if one person consumes the good it does not reduce the availability for subsequent consumers.

these caracteristics require the establishment of measures in order to prevent the destruction of a commonly owned space, for example, to restrict the amount of people that have access to the same time.