Final answer:
West Palm Beach (KPBI) is designated as Class C airspace, which is characterized by a moderate level of air traffic and includes a control tower and radar services.
Step-by-step explanation:
The class of airspace for West Palm Beach (KPBI) is Class C.
Airspace classes are determined by the Federal Aviation Administration (FAA) based on factors such as the amount of air traffic, the complexity of that traffic, and the level of air traffic services provided.
Class C airspace is typically associated with airports that have a moderate level of air traffic, including a mix of commercial, cargo, and general aviation activities.
These airspaces usually have an operational control tower, radar approach control, and a certain level of services available for pilots. KPBI, being an airport that fits this criteria, is appropriately designated as a Class C airspace.