Which statement best describes RAM (random access memory)?

The statement that best describes RAM is that it can be changed by the user or system and is lost when power is removed. Random access memory is a type of volatile memory, meaning that it requires power to maintain the information stored within it. When the power is turned off, all data contained in RAM is erased, which is a critical aspect that differentiates it from non-volatile storage alternatives such as hard drives or SSDs.

RAM is used primarily to provide space for the computer or system to temporarily store data that is actively being used or processed, ensuring quick access and modification. Its ability to be altered by the user or system also highlights its dynamic nature, allowing for tasks, applications, and processes to run efficiently. This characteristic is fundamental to the functional performance of devices and systems that rely on fast, temporary data access.

In contrast, non-volatile storage retains data even when powered off, which does not align with the fundamental properties of RAM. Therefore, the key characteristics accurately captured in the correct statement underline the temporary, volatile nature of RAM and its role in a computing environment.