Question

add the correct end punctuation for this sentence. i think that house is on fire

Explanation:

The sentence "I think that house is on fire" expresses a sense of urgency or alarm, so an exclamation mark is appropriate to convey the emotional tone of realizing a house is on fire. Alternatively, if it's a more neutral statement of observation, a period could work, but the context of a house being on fire likely calls for an exclamation mark to show the urgency.

Answer:

I think that house is on fire!