What are the three action types in firearms that allow for automatic reloading?

The correct choice identifies "semi-auto, bolt, pump" as the three action types in firearms that facilitate automatic reloading. In firearms terminology, "semi-auto" refers to semi-automatic actions where a single trigger pull results in one shot being fired and the firearm automatically chambers the next round from the magazine. This action allows for quicker follow-up shots without manual intervention.

Next, the "bolt" action refers to a manual operation method that can be changed with modifications to become more automated in certain designs, but it primarily requires the shooter to manually operate the bolt to load the next round after firing. While traditional bolt actions aren't known for automatic reloading, some modern variations may feature mechanisms that speed up the process.

Finally, the "pump" action requires manual operation to cycle the action, often seen in shotguns. This requires the shooter to pump the forend to eject the spent cartridge and chamber a new round. However, true automatic reloading is not typical in pump actions as it requires user input for reloading.

The other options do not accurately reflect types of reloading mechanisms or combine actions that wouldn't typically be associated together in the context of automatic reloading. Understanding these distinctions is crucial for comprehending how different firearms operate in relation to their