Final answer:
Vitamin B-6 plays a critical role in developing the nervous system of a fetus, specifically the brain and spinal cord. Deficiency of vitamin B-6 during pregnancy can result in neural tube defects.
Step-by-step explanation:
Vitamin B-6 plays a critical role in developing the nervous system of a fetus. It is important for the formation of the neural tube, which develops into the brain and spinal cord. Deficiency of vitamin B-6 during pregnancy can lead to neural tube defects, such as spina bifida and anencephaly. Therefore, it is important for pregnant women to consume sufficient vitamin B-6 to support the healthy development of the nervous system in the fetus.