Which of the following is a key responsibility of the remote pilot in command?

The key responsibility of the remote pilot in command is to ensure the UAS operates safely during flight. This encompasses various critical tasks, such as conducting pre-flight checks, monitoring flight conditions, and adjusting operations based on environmental factors. Safety is paramount in UAS operations, as the pilot must ensure that the aircraft adheres to aviation regulations and operates without endangering people, property, or other aircraft.

While managing software updates, coordinating deliveries, and maintaining the drone's appearance are important aspects of UAS operation, they do not hold the same level of importance regarding the immediate safety and effective functioning of the aircraft during flight. The remote pilot in command must prioritize safety to comply with legal standards and protect lives and property.