"As you play Freerice and answer questions right, advertisements appear on your screen. When you see one of these advertisements, you trigger a financial payment to the World Food Programme (WFP) to support its work saving and changing lives around the world. In the game, these payments are represented via grains of rice. The amount of money generated when you see an advertisement can vary, but is roughly equivalent to what the World Food Programme spends to purchase 5 grains of rice." Let's play Freerice together! Free Rice: https://freerice.com/categories/english-vocabulary