What started the modern agricultural revolution?

a. new types of crops
b. improved farming methods
c. greater demand for food
d. more fertile soil

B. improved farming methods

C. greater demand for food

Explanation:

After the Second World War, mainly in European countries, there were famines that motivated the implementation of new types of agriculture, species such as maize and wheat are grown in the monoculture modality, the obligatory monoculture to farmers and use large amounts of water, fertilizers and pesticides with which 2 to 5 times more production are obtained.

Improved farming methods started the modern agricultural revolution.

Further Explanation:

There are two agricultural revolutions in history;

The new method of crop rotation and livestock has evolved for better crop yielding. It supports a greater variety of wheat and vegetables. It helps the population to become nourished and healthier. Norfolk four-course system was the most famous crop rotation method in which four crops were grown in different years. In the first year, wheat was grown. In the second year, turnips were grown, which was followed by the barley, ryegrass, and clover.  

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Answer Details:

Grade: High school

Subject: Biology

Chapter: Agriculture

Keywords:

Farming, improved, agriculture, revolution, history, Neolithic, nomadic, sedentary, yielding, wheat, barley, ryegrass, Norfolk, clover.

i'd have to say the answer is probable the second option "the geosphere interacting with the atmosphere"