In IELTS Academic Writing Task 1, when describing a process diagram, which tense and voice combination is most commonly and appropriately used to explain the stages?

✓ Correct Answer: Option B

Process diagrams describe a general, repeatable sequence of events, not a specific past event. The present simple is used for general truths and processes, and the passive voice is often used because the focus is on the actions and objects involved, rather than who performs the actions.