Choose the correct variant. Talking about my summer holiday, I think I _______ at home.

The correct answer is "am going to stay". Explanation: In this sentence, we are talking about a future plan for the summer holiday, the speaker is expressing their intention or arrangement to stay at home, not a prediction, general habit, or something that is happening right now. 'will stay' is used for predictions or spontaneous decisions, 'stay' is the simple form and does not fit in this context, 'am staying' is for actions happening at the time of speaking or in the near future, so, "am going to stay" is the most suitable option to show an intention for future action. Therefore, the complete sentence is: "Talking about my summer holiday, I think I am going to stay at home." Correct option: "am going to stay"