Many congenital neurologic abnormalities can be prevented by the mother taking before conception and during early pregnancy.

Folic acid

Explanation:

The congenital neurologic abnormalities refer to the abnormalities which are present in the infant at the time of the birth like neural tube defects in the given question.

There could be many factors responsible for this like consumption of drugs and alcohol, exposure to mutagens or carcinogens, inadequate amount of folic acid and many others.

Folic acid is a type of Vitamin B which is involved in the production of new cells so are advised to the pregnant lady during and before conception. Consumption of folic acid reduces the chances of birth defects.

Thus, Folic acid is the correct answer.

increase soil erosion                                             reduce soil erosion

cattle grazing                                                         hydroseeding

deforestation                                                         contour plowing

                                                                                planting vegetation

plant roots basically hold the top soil

together and stop soil erosion because

in such situation top soil is not removed

during flood but cattle grazing causes

soil erosion because cattle consume the

grasses and herbs and top soil is exposed.

same situation occurs because of

deforestation, the trees and plants are cut

down to expose top soil which causes soil

erosion