Feed the people and become smart at same time

I was looking through the forums at RapidPremium and I came across an interesting thread. It was titled 'Free Rice'. So, I went into the thread and to my amazement, I don't get the free rice. The rice is actually for someone or some people. The people here are the poor people in the world.
The website is Free Rice FreeRice, tests the vocabulary of participants. For each click on a correct answer, the website donates money to buy 10 grains of rice. 10 grains don't seem much, but it will increase with every correct answer. The website was created in October last year and so far has raised 36 billion grains of rice. Great job!
So now it's your turn to do your part! Work hard and answer as many questions as you can. You will be helping others and yourself at the same time. (Two birds with one stone!)