Not sure what youre asking. Do you mean "Why is the sky Blue?" I dont think the sky does blue. either way its what lennox said. The scattering of light. Thats all it is.
When does the grass is stopped mowing?
Oh, stop! Many of the posters on this board had to learn English as a second language. How would you like to have to phrase question in Holoholo?Think: why does the grass is mowed? The grass does is mowed to know when to stop.