Alexis is learning several new routines in her gymnastics class. after enough practice, her will play an important role in her to perform the routines correctly and smoothly.

Cerebellum

Explanation:

The cerebellum is the part of the brain. It is located behind nearby the brain stem. It has two parts the left hemisphere and the right hemisphere. The cerebellum is a part that gets information from many of the sensory parts of the brain such as the spinal cord and other parts of the brain.

It regulated the motor skill of a person. It helps in coordination in the movement of a person. It helps in balance, movement, coordination, etc. It is a very important part help in learning motor behavior. It is the small part only about 10% of the brain weight. It is not a unique part but a very old part of the brain. Thus here Alexis learns many new skills in her gymnastic classes because of her cerebellum in her brain.

its d i know cause i've been googling it

i only have part a but here is the first one: - lewis and clark are born

- lewis marries sacajawea and clark is jealous  

- clark drowns lewis and then goes to jail