Which type of insurance might cover a customer who slips and falls on Alex's sidewalk?

The chosen answer is public liability insurance, which is designed to protect businesses and property owners from claims made by third parties for injuries or damages that occur on their premises. If a customer slips and falls on Alex's sidewalk, this type of insurance would cover claims related to bodily injury that arise from such incidents, potentially including medical expenses and legal fees.

This coverage is particularly important for businesses and property owners, as they have a responsibility to maintain safe premises for visitors. Public liability insurance typically includes protection against slip and fall incidents, premises-related injuries, and other types of accidents occurring on the property.

The other options do not specifically address this scenario. Negligence insurance is more of a legal concept related to liability rather than a specific insurance policy. Product liability insurance pertains to injuries caused by defective products rather than incidents occurring on a property. Employer liability insurance covers employer obligations towards their employees, which is not relevant to a customer injury scenario on a sidewalk.