What's the difference between 3d and 2d

True of false? green is the most used colors on websites

The major axis of earths orbit is 299,200,000 km, and the distance between the foci is 4,999,632km calculate the eccentricity of earths orbit. how does this value compare to the value noted in. the digging dipper?

There’s a one story house everything’s purple , the sofa the walls everything what color is the stairs