Final answer:
Folic acid plays a crucial role in the process of neural tube closure during embryo development.
Step-by-step explanation:
Folic acid, a form of folate which is a B vitamin, plays a crucial role in the process of neural tube closure during the development of the embryo. The neural tube is formed from a structure called the neural plate, which folds inward and converges to form a tube. Folic acid is necessary for the proper development of the neural tube, and a deficiency of maternal folate can lead to neural tube defects such as spina bifida. By ensuring sufficient intake of folic acid during early pregnancy, the risk of these defects can be reduced.