Which of the following describes volatile memory?

Volatile memory is characterized by the loss of stored data when power is removed. This means that any information stored within volatile memory, such as RAM (Random Access Memory), is temporary and only exists while the device is powered on. When the computer or device is turned off, all data in volatile memory is erased. This feature is crucial for applications that require quick access to data during processing, as it offers fast read and write speeds.

The other options do not accurately describe volatile memory. For instance, permanent data storage is associated with non-volatile memory, such as hard drives or SSDs, which retain information even without power. While system storage might utilize both volatile and non-volatile memory, the defining feature of volatile memory is its dependence on continuous power. Regarding speed, volatile memory is generally faster than non-volatile memory, making it ideal for tasks that require rapid data access during active processes.