Jennette, a world-class gymnast, holds several gold medals for her balance beam performances. jennette is also very accurate when telling how much time it has taken her to perform. the part of jennette's hindbrain responsible for both her talent on the balance beam and her ability to accurately estimate the elapsed time for a given performance is called the

   Cerebellum

Explanation:  Cerebellum, or "little brain" in Latin, is located in the hindbrain, and thanks to this hindbrain, motor functions and skills are regulated, making Jennette world-class in gymnastics. These motor skills include coordination, balance and posture. In addition, the cerebellum plays an important role in cognitive functions such as language, attention, emotional functions and regulating, for example, fear, and processing of memory. Because of that ability to process memories, Jennette remembers exactly how long it took her to reach this level of performance.

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