Which command is tasked with organizing, training, and equipping mission-ready space forces?

The correct answer is based on the specific role of Air Force Space Command, which is responsible for organizing, training, and equipping mission-ready space forces. This command plays a critical role in providing the United States with capabilities in space operations, including satellite communications, missile warning systems, and space surveillance.

Air Force Space Command is fundamental in ensuring that the Air Force can effectively integrate space operations into joint and combined missions, thereby enhancing overall mission effectiveness. By maintaining readiness and operational capability in space, it is prepared to support a range of military operations across the globe.

The other commands mentioned in the options have distinct missions that do not focus specifically on space. For instance, Air Mobility Command concentrates on air mobility operations, Pacific Air Force focuses on the Asia-Pacific region's air defense and operations, while Air Force Special Operations Command specializes in unconventional warfare and special operations missions. Each of these organizations has a unique mandate that is crucial to their respective missions but does not encompass the specific responsibilities related to organizing, training, and equipping space forces like Air Force Space Command does.