What does a bill trap hold between its components?

A bill trap is a mechanism used in various devices, such as cash registers or automated teller machines (ATMs), to securely collect and trap paper currency that is inserted into the system. Its primary function is to prevent theft or unauthorized access to the money by holding paper bills tightly between its components. This design ensures that only authorized personnel can retrieve the trapped currency, enhancing security.

The other options—coins, identification cards, and coupons—describe items that are not typically associated with a bill trap's functionality. Coins are usually stored in separate compartments due to their different physical characteristics and value systems. Identification cards and coupons are not meant to be trapped or collected in the same manner as paper currency, which is why these options do not align with the specific purpose of a bill trap.