Why should you avoid working alone when trimming trees?

Working alone when trimming trees poses significant risks due to the inherent dangers associated with this activity. Having a partner provides crucial assistance in emergencies or accidents, ensuring that someone is available to call for help, provide first aid, or manage a dangerous situation. This support can be vital in case of falls, equipment failure, or other unforeseen events that might require immediate attention, making it safer and more responsible to work in pairs.

The other options, while they touch on valid points, do not address the primary safety concern. For instance, while efficiency and speed can be improved with a partner, the main focus should always be on safety first. Sharing equipment might be practical, but it does not necessarily increase safety. Prioritizing having a second person on site ensures that help is immediately available if something goes wrong, reinforcing the importance of teamwork in hazardous environments like tree trimming.