Elise is beginning to learn how to write. She can hold a pencil in one hand and steady the paper with her other hand. This new ability to coordinate the duties of her right and left hands is likely due to _____.
A) the growth of her corpus callosum
B) her arms and legs growing longer
C) her brain's lateralization
D) adequate calcium in her diet

Question

Quizplus · Accepted Answer

The growth of the corpus callosum connects the two hemispheres of the brain, allowing for better communication and coordination between them, which is necessary for tasks such as holding a pencil and paper steady with separate hands. Legs growing longer (B) and adequate calcium in the diet (D) are not directly related to fine motor coordination. Lateralization (C) is more involved with specialization of different functions in each hemisphere, rather than coordination between the two.

Elise Is Beginning to Learn How to Write