What defines burglary?

Burglary is defined by the unlawful entry into a building or structure with the intent to commit a crime inside, which is encapsulated in the correct answer. This definition emphasizes the element of entry—whether it's by force, deceit, or without permission—as well as the intent to commit an unlawful act once inside, such as theft, vandalism, or assault.

The other choices lack key components of this definition. Stealing without entering a structure does not fulfill the criteria for burglary since it does not involve the act of entering a property. Seeking permission to enter a building directly contrasts with the nature of burglary, as lawful entry negates the criminal aspect. Similarly, breaking in without intent does not satisfy the definition since intent is a crucial component of the crime of burglary; mere entry, even if unlawful, without the intention of committing a crime cannot be classified as burglary.