response: That's nice. Did you know that red on apples and strawberries is due to anthocyanins? Blood is red because of hemoglobin.
original_response: Not forgetting blood is red too. That's to tell you how important the color is
history: I like red color Oh, OK. Were you aware that Mars is red because of iron oxide? I am not too sure of that but I would say I love red cars and roses Good to know. On another note, there is a metal that's in the first transition series. Uh, OK. I like red Toyota Camry sports versions. What other red things do you know about? The sunset is red because of Rayleigh scattering. And the Grand Canyon is red because, ultimately, of iron oxide. Oh, neat! I like red on cakes.
knowledge: The red colour of blood comes from protein hemoglobin, while ripe strawberries, red apples and reddish autumn leaves are colored by anthocyanins.