The correct answer is: B. agriculture.
Green revolution is a series of research and development methods that dramatically increased agricultural production in the mid-20th century. These methods, including new high-yielding varieties of crops, synthetic fertilizers, and pesticides, have greatly increased the world’s food supply.
Sericulture is the production of silk, which is a natural fiber made from the cocoons of silkworms. Fish culture is the cultivation of fish in a controlled environment, such as a fish farm. Silviculture is the management of forests for the production of timber and other forest products.
While all of these activities are important to the agricultural sector, only agriculture is directly associated with the green revolution.