Question

understanding scientific texts — quiz — level c
el cinturón del maíz
the part of the united states shown in green is known as the corn belt.
farming in the corn belt is often a family business. grandparents and parents often share everything they know about growing corn with their children. when the children are older, they carry on the tradition of running the farm. but lately, temperatures in the corn belt have gotten warmer. more rain than usual falls every year. because of the changes in weather, corn farmers are sometimes forced to do things differently than they have in the past.
what important work do farmers do in middle of the united states?
they raise most of the world’s animals.
they provide most of the world’s fuel.
they grow most of the world’s corn.
they ride most of the world’s tractors.

Explanation:

The text and map show the green area is the Corn Belt. The passage focuses on corn farming there, and the other options (raising most animals, providing most fuel, riding most tractors) don't match the context about the Corn Belt and corn farming.

Answer:

They grow most of the world's corn.