Answer: behavior modification
Explanation:
The token system is a method used in behavior modification to reinforce desirable behavior and reduce unwanted behavior. Reinforcement is in the form of a valuable item which is given to the individual whose behavior is being modified. This reward/token can be used within the system, but is usually not a valid form of exchange outside the system. For example, while the chip used here is a suitable form of token, money is not.
Answer: An obsession is an unwanted, intrusive, and often unpleasant thought that causes an increase in anxiety.
well sahara is the largest hor desert of the world. the people became nomads, and goat and camel herders. The coatal area north of sahara does still produce fruits and some grains. Even durinf roman times the coastal area flourished with some powerful country/states, until the Romans conquered them and incoporated large areas of North Africa into the empire. if u will notice population in the sahara is not very large but is able to support certain tribes like the Tauregs.
..............hope it help!! >.<
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