I am a drop of water. I am very small, so small that you could hardly see me; but I a

I am a drop of water. I am very small, so small that you could hardly see me; but I am part of a great stream, and the great stream is part of a mighty river, and the mighty river is part of the ocean. I am a drop of water, but I am also a drop of life. I help to make the plants, which feed the animals, and the animals feed the men. So you see, I am very necessary, and