Final answer:
Option A). Scavenging is the term used to describe the removal of combustion products from an internal combustion engine. It involves clearing out the burnt gases from the engine cylinder to make room for fresh fuel and air mixture for the next combustion cycle.
Step-by-step explanation:
Scavenging is the process of removing combustion products from an internal combustion engine. The act of removing burned gases from the engine cylinder to create space for new fuel and air mixture for the subsequent combustion cycle is known as scavenging. To ensure effective engine operation, it entails timing and flow of intake and exhaust valves correctly.