Read the text below and answer the questions from 11 to 14

Rice is a staple food for a large part of the world’s population, providing more than one fifth of the calories consumed worldwide, making it the second-most-consumed cereal grain. The rice plant grows about 2 to 5 feet high and is a flowering plant.

Rice is composed of the grain and husk. The grain is mainly used as food, but the vitamins, including B-complex, are found in the husk. Most people prefer to eat polished rice without the husk, but this can create a vitamin deficiency because polished rice doesn’t have many vitamins.

Much of the rice that we eat comes from southeastern Asia and grows in all countries that have a warm and moist climate, including India, China, and Japan. The traditional method for cultivating rice is to flood the fields after planting the seedlings. This simple method requires planning and maintenance of the water supply, but reduces the growth of weeds and deters vermin. Flooding is not mandatory, but all other methods of irrigation require more effort in weed and pest control and different methods of fertilization.

COOK, Ann, Grammar: American Accent Training – 2009, Page 208.