What is the first step in the instruction cycle, where the next instruction is retrieved from main memory?

The first step in the instruction cycle is the retrieval of the next instruction from main memory, which is referred to as the "Fetch" phase. During this phase, the CPU uses the program counter to identify the memory address of the instruction that needs to be processed next. It then reads the instruction from that memory address and brings it into the CPU for processing. This step is crucial as it initiates the workflow of executing the program, establishing the foundation for the subsequent steps, which include decoding the instruction and executing it.

The other choices represent different phases in the instruction cycle that occur after the fetching of the instruction. Decoding involves interpreting the fetched instruction so the CPU can understand what actions to perform. Executing refers to the actual carrying out of the decoded instruction. Storing typically involves saving results back into memory after execution. Therefore, Fetch is clearly identified as the essential first step in this process.