No person shall willfully fail to obey a law enforcement officer who is doing what?

The choice indicating that no person shall willfully fail to obey a law enforcement officer who is directing traffic is correct because this specific scenario emphasizes the importance of public safety and the officer's role in managing the flow of vehicles and pedestrians. When an officer is directing traffic, they are performing a critical function aimed at preventing accidents and ensuring safe travel for all road users.

Obeying traffic directives from a law enforcement officer is particularly significant because it directly impacts the safety of individuals in a dynamic environment where vehicles are in motion. Failure to comply with such directives can lead to dangerous situations, including accidents or injury to pedestrians. Thus, the law is strict in this regard to emphasize the need for compliance to maintain order and safety on the roads.

The other options, while they involve interactions with law enforcement, do not capture the same level of immediate public safety and urgency tied to traffic direction. Patrolling can involve a variety of law enforcement activities that may not require immediate compliance; making an arrest, while serious, pertains to a different legal context and doesn’t inherently demand real-time compliance like traffic management does; and investigating a crime often occurs in a context where the general public isn't necessarily required to follow commands immediately. Hence, directing traffic stands out as the specific action