The sentence missing an apostrophe for a contraction is Sentence 9.
Sadly, even after that water is found, only some of its clean and safe enough to drink.
"its" should be "it's"
A short way of written and spoken forms of a word, syllable, or word group, created by omission of internal letters and sounds is called Contraction.
A foot<span> in </span>poetry<span> refers to the metrical </span>foot<span>. It is a unit of measure </span>used<span> to analyze the rhythm of a </span><span>poem</span>
I took a test with this question a few days ago and the answer was Structure 2. Hope this helps.
