Final answer:
The number of people required to position a belt loader up to a plane may vary, but generally, it can be operated by a single individual.
Step-by-step explanation:
In the context of positioning a belt loader up to a plane, the number of people required may vary depending on the specific circumstances and equipment being used.
Generally, an aircraft belt loader can be operated by a single individual. However, in certain cases where additional assistance is needed, two or more people may be required to safely maneuver and position the belt loader.