Final answer:
A personal fall arrest system includes a harness, lanyard, and anchor point, all of which are essential for worker safety at heights.
Step-by-step explanation:
A personal fall arrest system includes components designed to safely stop a person from hitting the ground after falling from an elevation. Specifically, it consists of a harness, a lanyard, and an anchor point. These systems are vital for worker safety in environments where there is a risk of falling from heights, such as construction sites. While safety nets and lifelines may also be used as part of a comprehensive fall protection plan, a personal fall arrest system is specifically associated with the three components mentioned above. Hard hats and safety glasses are examples of personal protective equipment but are not part of a fall arrest system.