A(n)
wave carries energy through space.

Answer is: electromagnetic.

Electrons can jump from one energy level to another, absorbing or emitting electromagnetic radiation with a frequency ν (energy difference of the levels).

For example:

Radio waves are the electromagnetic waves with the longest wavelengths (1dm to 100 km), lowest frequencies (3kHz to 3GHz) and lowest energy (124 peV to 12,4 μeV).

Gamma rays are the electromagnetic waves with the shortest wavelengths (1 pm), highest frequencies (300 EHz) and highest energy (1,24 MeV).

The correct answer is Electromagnetic waves.

Explanation:

There are two types of waves:

Electromagnetic waves are defined as the waves which can travel through vacuum. These waves have electrical and magnetic component associated with them. They all travel with the speed of light. These does not require any medium to propagate and can travel in vacuum. For Example: Light waves

Mechanical waves requires a medium to travel so they can transport their energy from one location to another location. For Example: Sound Waves.

Hence, the correct answer is Electromagnetic waves.

i think it's letter a.