Electromagnetic waves with a short wavelength occur at a frequency and are energetic. A. low; less B. high; more C. high; less D. low; more

B

Explanation:

High frequency electromagnetic waves are more energetic. For all electromagnetic wave the greater the frequency the lower the wave length. This is a fact, even high frequency electromagnetic can carry information per unit time than low frequency wave.

i think the literacy device is "it's frozen head"

the answer is "began" because it is a action that can be done