Step 1: RAM is the main working memory of the computer. It holds the programs and data currently in use, so the CPU can access them quickly. Step 2: RAM needs continuous electric power to keep its data. Step 3: When the computer is switched off, everything in RAM is lost. Such memory is called volatile memory. Step 4: In contrast, ROM, hard disks and SSDs keep data without power (non-volatile). Answer: Volatile.