which fetal development occurs during the second trimester?\no bones begin to harden.\no the roof of the…

which fetal development occurs during the second trimester?\no bones begin to harden.\no the roof of the mouth forms.\no the eyes can sense changes in light.\no the heart and circulatory system begin to develop.

which fetal development occurs during the second trimester?\no bones begin to harden.\no the roof of the mouth forms.\no the eyes can sense changes in light.\no the heart and circulatory system begin to develop.

Answer

Answer:

A. Bones begin to harden.

Brief Explanations:

In the second trimester of fetal development, bones start to harden (ossification). The roof of the mouth forms in the first - trimester. The eyes can sense light changes in the third trimester. The heart and circulatory system begin to develop in the first few weeks of the first trimester.