Which of the following describes a probable cause?

A reasonable belief that a crime has been committed accurately describes probable cause because it establishes a threshold for law enforcement officers to take action, such as making an arrest or obtaining a search warrant. This standard is based on factual evidence and circumstances that would lead a reasonable person to conclude that a crime has likely occurred. Probable cause requires more than just a vague feeling or intuition; it demands a solid basis in observable facts or information that can be articulated.

The other choices fail to meet this legal standard. A mere hunch or suspicion lacks the necessary factual foundation, while intuition based on past experiences is subjective and not grounded in concrete evidence. Additionally, field notes and observations can contribute to establishing probable cause but are not, by themselves, a definition of it. They must be weighed and evaluated in the context of the situation to form the basis of a reasonable belief regarding criminal activity.