Juan wants to teach his dog to bark when someone comes into the yard. At first, he rewards the dog whenever it barks. Then he rewards the dog only if it barks when a person walks by the house. Next, the dog is rewarded for barking only if a person stops by the house, then only if the person touches the gate. Finally, the dog is rewarded only for barking when a person actually opens the gate and enters the yard. Juan is using a step-by-step learning technique called.

alarming its owner that someone is near or inside the house,

you can say an emergency alarmer?

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.

the first two-party system consisted of the federalist party, who supported the ratification of the constitution, and the democratic-republican party or the anti-administration party (anti-federalists), who opposed the powerful central government, among others, that the constitution established when it took effect in