Which of the following relates to aggravated shoplifting?

The concept of aggravated shoplifting typically refers to more serious forms of theft that involve additional actions which elevate the crime beyond simple shoplifting. The use of a shield device is specifically designed to prevent security tags from functioning properly, effectively facilitating theft. This additional layer of deception and intent to bypass security measures categorizes it as aggravated shoplifting.

While removing security tags, concealing items in a bag, and switching price tags represent actions associated with shoplifting, they do not inherently elevate the crime to an aggravated level as directly as using a shield device does. Each of those actions can be considered part of standard theft behavior, but the use of a shield device shows a deliberate intent to commit theft by undermining security systems, indicating a higher degree of criminal intent and planning. Hence, it aligns with the definition of aggravated shoplifting more closely than the other actions.