Which of the following is an example of a procedure?

The correct choice is the statement regarding Megan needing to enter a specific username and password to access her work computer. This statement exemplifies a procedure because it outlines a specific series of steps that must be followed to achieve a particular goal—gaining access to a computer system. Procedures are typically characterized by detailed instructions or protocols that provide clear guidance on how to carry out a task or function.

In contrast, the other options do not exemplify clear procedures. Purchasing materials for a project can involve various processes but is a broader action rather than a step-by-step guide. Similarly, writing a product description and creating a marketing strategy are tasks that involve creative or strategic thinking but do not provide the structured approach that a procedure entails. These actions can encompass various methods and strategies that might not necessarily follow a strict set of steps.