Explanation:

- Option:1, when his team

- This part of the sentence is correctly structured. It introduces a subordinate clause about what happened.

- Option:2, was won

- This construction is grammatically incorrect. "Was won" implies a passive form where "team" is not the subject. The correct form should be "won," making it active voice.

- Correct Answer

- Option:3, The sports teacher

- This correctly identifies the subject of the sentence. No error here.

- Option:4, was elated

- This part correctly describes the sports teacher's emotional state using the past tense of "be" with a past participle.