Which offense involves entering a building or property with the intent to commit a crime?

The offense that involves entering a building or property with the intent to commit a crime is burglary. This crime is defined by the unlawful entry into a structure with the intent to commit an illegal act, typically a theft or another crime, once inside. The key element of burglary is the intention to commit a crime at the time of entry, which distinguishes it from other offenses.

The other options represent different types of crimes that do not specifically focus on the illegal entry into a building or property. Theft refers to unlawfully taking someone else's property, robbery involves taking property through force or intimidation, and fraud pertains to deception in order to secure unfair or unlawful gain. Each of these crimes has distinct elements and does not encompass the specific intent and unlawful entry that define burglary.