HELP ME PLEASEE forget

WAVE #3

Explanation:

Radio waves have the longest wavelengths in the EM spectrum, according to NASA, ranging from about 0.04 inches (1 millimeter) to more than 62 miles (100 kilometers). They also have the lowest frequencies, from about 3,000 cycles per second, or 3 kilohertz, up to about 300 billion hertz, or 300 gigahertz

answer; /// i believe the correct answer is (reactants);

you can have just about every answer you can think of