The answer would be -- A. Cenozoic
The three grains are rice, wheat, and corn
Rice is the main grain used in places such as Asia ans SEA, corn is mostly used in the Americas, while wheat is mostly found in European countries.
Earth's tilt on its axis affects the way heat is distributed on Earth's surface.
The Earth orbits the sun every 365 ¼ days. The Earth is tilted 23.5 degrees on its axis, which affects the distribution of the sun’s energy across the surface of the planet. More tilt means more severe seasons, that is warmer summers and colder winters where as less tilt means less severe seasons, that is cooler summers and milder winters.
Find out more on earth tilt at: brainly.com/question/818630