Used to introduce a second, alternative outcome after already giving one prediction.
“Another possibility is that the meeting gets postponed until next week.”
“Another possibility is that the dog runs after the ball into the street.”
Task 4 responses score higher when you offer more than one possible outcome, and 'another possibility is' is the perfect connector for that second idea. For example: 'Another possibility is that she decides to wait for the next bus instead.' This shows the examiner you can think flexibly about different outcomes, not just one fixed answer.
Synonyms: alternatively, another option is, it's also possible that