True or false:
the first civilizations grew around rivers, and there were 4 main ones. they included egypt, sumer, indus civilization, and shang china.

the correct answer is blue and green.

a visible spectrum is electromagnetic spectrum color that can be seen by a normal human being by a single wavelength of light. the visible light spectrum is the range of wavelengths that make up visible light. the visible light spectrum passes through a prism enabling the rainbow reveals all the colors in the spectrum. these range from red, orange, yellow, green, blue and violet.

answer (a) more rain in u s and less rain in australia and asia