Which of the following is a key safety element to wear when operating a chainsaw?

Wearing chainsaw chaps is a key safety element when operating a chainsaw because they are specifically designed to protect the operator's legs from cuts and injuries that can occur from the chainsaw chain. These chaps are made from materials that can slow down or stop the chain upon contact, significantly reducing the risk of serious injury.

While hard hats, protective gloves, and safety goggles are also important for overall safety, they serve different purposes. Hard hats protect the head from falling objects, gloves provide grip and hand protection, and safety goggles shield the eyes from debris. However, chainsaw chaps directly address the specific risk of leg injuries from a chainsaw, making them a crucial part of the personal protective equipment when engaged in this type of work.