Question

Please someone help me with this

Their sure the only sounds they will hear at night will be the wash of ocean waves or the croaks of bullfrogs. What correction should be made to this sentence?
(1) change Their to They're
(2) insert a comma after sure
(3) change the spelling of hear to here
(4) change will be to are
(5) change will be to is
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Answer 1

The answer is 1.) Because the definition of the form of their they used in the story means they own it so if you change it to they’re, it means they are. therefore the answer is 1.