Answer:
Radio waves are a type of electromagnetic (EM) radiation with wavelengths in the electromagnetic spectrum longer than infrared light. They have have frequencies from 300 GHz to as low as 3 kHz, and corresponding wavelengths from 1 millimeter to 100 kilometers.
Explanation:
The answer is D, because it is a known fact that is it mandatory for children to go to school.
Answer:
My amount in toys is cumulative .
Explanation: