Respuesta :
After reading the sentence, we tell that the mistake caused by subject-verb agreement is:
D. Die.
- Every verb in the English language must have subject that precedes it.
- In the sentence we are analyzing here, the verb "die" has "the mass of fish" as its subject.
- However, when we analyze that subject a little closer, we notice that its main word is "mass", which is a singular word.
- The verb "die", therefore, is not in its appropriate form. To agree with the subject "mass", it should be "dies" (third-person singular).
- The correct phrase would be: "... since the mass of fish dies."
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