Answer:
The answer to your question would be that the sentence that contains a nonessential adjective clause is the following one: The officials revised the rules, which the coach explained to us before the practice.
Explanation:
The sentence above contains a nonessential relative clause introduced by the relative pronoun <em>which.</em> The clause is nonessential because the information it provides is not relevant to complete the meaning of the sentence. If it was removed, the sentence would not be altered (see 1). This is also why the clause is separated from the rest of the sentence with a comma.
1) The officials revised the rules
The answer is tells because the other answers are not neutral.
The correct answer to this question is:
"Relative abundance is a comparison between the isotopes and Percent abundance is a comparing the totals." Relative<span> species </span>abundances tend to conform to specific patterns. Percent abundance <span> can be calculated by finding the percentage of an isotope compared to another isotope of an element using its relative atomic mass.</span>
