Reason being is because a comma is essentially a pause in a sentence. Sometimes that isn't the case. However, ninety percent of the time its a pause simply think about where a pause should be in any sentence.
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.
B. Advocacy because theres no research and evidence
I believe its a cell that is created by the intersection of a row and a column.