I believe the correct answer is: a token economy.
A token economy represents a form of behavior modification
which is designed to increase desirable behavior and decrease undesirable
behavior with the use of tokens. When individuals display desirable behavior,
they receive tokens. The collected tokens may later be exchanged for a
meaningful object or privilege.
Since Tim suffers from attention deficit hyperactivity
disorder (adhd), his teachers and parents apply a token economy to reward him
with stars for desirable behaviors.
The Rub' al Khali or Empty Quarter is a desert in Saudi Arabia. It is one of the largest sand deserts in the world. It covers an area of about 650,000 square kilometres, more than all of Holland, Belgium and France together. Some of the sand dunes are more than 250 metres high.
Over a long period of time (> 0.5 Ma), boisei had a diet predominantly composed of C4 resources, most likely grasses or sedges (Turkana, Baringo, Natron, and Olduvai regions).
Massive and low-cusped postcanine teeth, thick and large mandibular corpora, and strong masticatory muscles are all characteristics of the East African hominid Paranthropus boisei that are usually thought to be adaptations for a diet of nuts, seeds, and hard fruit.
This hypothesis was based on analyses of the morphology of P. boisei, but it also received indirect support from dental microwear studies of P. robustus, a close relative. These studies found that the South African Paranthropus had molar wear consistent with it having ingested and chewed small, hard food items, if not as primary resources then at least as backup foods.
To learn more about boisei, refer
brainly.com/question/4368074
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