Before combustion can occur, the combustion air must be delivered to the combustor at a high-pressure and low-velocity. High-velocity, low-pressure air is converted to high-pressure, low- velocity air at what part of the compressor?

Correct Answer: Option C — Diffuser.

The diffuser is the critical component located immediately after the compressor rotor. It is designed with a divergent shape to slow down the high-velocity air exiting the compressor blades. This deceleration converts the kinetic energy into static pressure, ensuring the air enters the combustor at the required pressure.