In a flowchart, different shapes represent different types of actions or elements in a process. The rectangle symbol (often called a process box) is typically used to denote a process step or an action that is part of the workflow.
Given the options provided, the correct response is:
Access to the system given is a single step in a process.
This indicates that this action is part of the overall sequence of operations in the development process, fitting the definition of what a rectangle represents in flowcharting.