《落花生》, also known as "peanut," is a legume that grows underground. It is native to South America and is widely cultivated in many countries for its edible seeds. The plant produces yellow flowers that, after pollination, develop into pods that contain the peanuts. Peanuts are rich in protein, healthy fats, and various vitamins and minerals. They are commonly used in cooking and snacks, often found in products like peanut butter and oil. Additionally, peanuts play a significant role in agriculture, as they can improve soil fertility through nitrogen fixation.