Which of the following is prohibited within 100 feet of an aircraft?

Smoking is prohibited within 100 feet of an aircraft primarily due to safety and fire hazard concerns. This regulation is in place to minimize the risk of fire, as aircraft contain flammable materials and can be sensitive to sparks or open flames. Smoking near an aircraft could potentially ignite fuel vapors or other combustible substances, leading to catastrophic accidents.

The other activities listed, such as driving, parking equipment, and transporting baggage, are typically regulated by different safety protocols but do not inherently pose the same immediate fire risk as smoking does. Each of these activities can be managed under controlled conditions, ensuring that they are executed safely without compromising the integrity of the aircraft and the safety of personnel involved.