How does an excavator's stick function?

The stick, also known as the arm or dipper arm, plays a crucial role in the operation of an excavator by extending its reach and enhancing flexibility when maneuvering the bucket. By effectively connecting to the bucket on one end and pivoting at the base, the stick allows operators to dig deeper or further away from the machine's body without needing to reposition the entire excavator. This functionality is essential for various tasks, such as trenching, grading, or moving materials, providing the versatility needed in diverse work environments.

The other options do not accurately describe the function of the stick. For instance, the stick does not connect the tracks to the body or move the excavator forward, as those roles are handled by different components of the excavator, such as the tracks and undercarriage. Additionally, while digging is one of its activities, the stick's primary purpose is to facilitate a wider range of motions and reach, which extends beyond just digging tasks.