Question

which fetal development occurs during the second trimester?
○ bones begin to harden.
○ the roof of the mouth forms.
○ the eyes can sense changes in light.
○ the heart and circulatory system begin to develop.

Explanation:

To determine fetal development in the second trimester, we analyze each option:

• "Bones begin to harden" occurs in the second trimester as fetal bones ossify (harden) during this period.
• "The roof of the mouth forms" and "The heart and circulatory system begin to develop" happen in the first trimester.
• "The eyes can sense changes in light" occurs in the third trimester as the eyes mature for light perception.

Answer:

A. Bones begin to harden