Final answer:
The sentence should be rewritten with commas to set off the appositive.
Step-by-step explanation:
The subject of the question is English. The sentence given, "Our town Grantsville will host this year's summer celebration," should be rewritten correctly by adding commas where they belong. The revised sentence would be: "Our town, Grantsville, will host this year's summer celebration." The correct placement of the commas sets off the appositive "Grantsville" which provides additional information about the noun "town."
Learn more about Punctuation in English sentences