Final answer:
A memory address is an identifier for each data item in computing, which differs from the variable name that programmers use in code.
Step-by-step explanation:
Each data item has a memory address, but this name is not typically used by the programmer; rather, it is just a means to uniquely identify each data item. The options provided were: 1) Variable name, 2) Memory address, 3) Data type, 4) Value. In programming and computing, a memory address is a numeral value used by the computer's hardware and software to access the location in the memory. While a variable name is what programmers use to refer to data in their code, and a data type specifies what kind of value a variable can hold, a memory address is associated with every piece of data, allowing the computer system to access it efficiently.