Which of the following methods can burglars use to open a safe?

Burning a safe can indeed be an effective method that burglars might use to access its contents. This approach typically involves applying extreme heat to compromise the locking mechanism or the safe's structure. Many safes are designed to withstand various methods of forced entry, including blunt force trauma, so burning is sometimes seen as a more reliable way to defeat a safe that may be resistant to other types of attacks.

This method relies on the heat to weaken the materials of the safe, potentially making it easier to pry open after the intense heat has compromised its integrity. Different types of safes are designed to withstand fire and heat to varying degrees, but persistent application of high temperatures can overwhelm even robust models.

Other methods like smashing, dropping, or unplugging rely on brute physical force or the assumption that the safe is electronic, which may not always be applicable or effective against all safe constructions. Therefore, burning can be seen as a more calculated approach by burglars who are aware of a safe's vulnerabilities.