Which one of the following statements is accurate?
a. the green revolution was instrumental in the increase of the world's food supply.
b. gymnosperms provide humans with the most food.
c. wheat, corn, soybeans, and cabbage are the main four plants responsible for providing food to people in the world.
d. agriculture has been challenged by the use of selective breeding.

A. the green revolution was instrumental in the increase of the world's food supply.
before the green revolution there was a constant global food shortage but after the green revolution crop production has been gradually increasing every successive year

Because the earth is not round ,but it may seem round when viewed from ,our planet but true some points earth is not round was an oblate spheroid -a square that it squashed as globe however is not even a perfect oblate spheroid.in fact isaac newton's first proposed that earth was not perfectly round but it was an oblate spheroid instead.that mean a square that is squashed as its poles and swollen at the