The is a movement encouraging farmers to adopt modern agricultural methods.

Green revolution

Explanation:

The Green revolution is a movement that has come to the scene in the 1960's. This movement's purpose has been to encourage the farmers to use modern agricultural methods, so that they can produce in higher quantities, have lower losses, and higher profit. The main reason behind this is that the world population has been constantly growing, sot here's more and more mouths to feed, thus more and more food is constantly needed. By using the modern agricultural methods, the production of food increases, thus the problems with the malnutrition is gradually eliminated step by step.

b europeans take corn to africa. corn becomes an important crop there.