Eight-Year-Old Ella Can Use Scissors to Cut Small Paper Dolls

question 77

Multiple Choice

Eight-year-old Ella can use scissors to cut small paper dolls out of construction paper, something she could not do at age three. What BEST accounts for her improving dexterity?

• A) Cortical thickening in the temporal lobe
• B) Increased myelination of the central nervous system
• C) Increased bone ossification
• D) Increased muscle development

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Definitions:

Magnesium

A chemical element (Mg) that is a vital mineral for the human body, involved in over 300 biochemical reactions.

Phosphorus

A chemical element with the symbol P and atomic number 15, essential for life, used in fertilizers, and present in bones, DNA, and ATP.

Parathormone

A hormone produced by the parathyroid glands that helps regulate calcium levels in the blood.

Calcium

An essential mineral for human health, crucial for bone and teeth formation, blood clotting, and muscle function.