Answer:
region 2 and region 3
Explanation:
you can tell by the color of the land my friends^^
Your answer is radio waves
Answer:
<em>The electrons in an atom can only occupy certain allowed energy levels to a lower one</em>, the excess energy is emitted as a photon of light, with its wavelength dependent on the change in electron energy. This is why an atom can only emit specific wavelengths of light and not every possible wavelength.
A spund waves can travel through ALMOST everything.