Final answer:
In this English question, punctuation in a sentence needs to be corrected by adding or removing commas.
Step-by-step explanation:
The subject of this question is English. The student is asked to add or remove commas in a sentence until it has correct punctuation. The given sentence is:
Barney Gumble's pie completely burnt to a crisp was mistaken for chocolate cake at the bake sale.
In this sentence, there should be a comma after crisp as it is a non-essential clause. The correct punctuation should be: Barney Gumble's pie, completely burnt to a crisp, was mistaken for chocolate cake at the bake sale.
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