The correct option is B.
The green revolution is the name used to describe the significant increase in agricultural productivity and therefore food between 1960 and 1980 in the united states that later spread to other countries.
The green revolution consisted in the planting of improved varieties of corn, wheat and other grains, cultivating a single species on a plot throughout the year, planting improved varieties of corn and other grains by applying large amounts of water, fertilizers and pesticides. With these varieties and procedures, it is perceived that the production is greater than that obtained with traditional techniques and varieties of culture. However both techniques can be equally efficient with good management, and this revolution brought with it the deterioration of life in the soil of the fields.
It was initiated by the american agronomist Norman Borlaug with the help of international agricultural organizations. Borlaug s motivation was the low agricultural production and the eradication of hunger.