Question

A spectroscope helps to identify elements by separating(WHAT)into lines of color.

1:light
2:soundwaves
3:radiowaves
4:rainbows

Answer 1

This is actually physics but the answer is:
1: light.

Hope this helps :)

Answer 2

I believe it is 1: light. The root "spectro-" means radiant energy, aka light. Also think of the rainbow!