Final answer:
Corn is the most common crop in the United States, which makes either spinach or watermelon the correct choices for the crop that is NOT the #1 crop in the US, since the option 'terzs' seems to be irrelevant or misspelled.
Step-by-step explanation:
The question which crop is NOT the #1 crop in the United States can be answered by referring to the provided reference that states corn (maize) is the most common crop in the US. Given the options spinach, watermelon, a misspelled or irrelevant choice (terzs), and corn, it is clear that corn cannot be the correct answer since it is indeed the top crop produced in the US. Therefore, by elimination, either spinach or watermelon would be the correct answer as the #1 crop in the United States. Based on the reference that field corn ranks only behind wheat and rice worldwide, corn (maize) would be the most significant crop in comparison to spinach and watermelon, although the question does not specify which of these two is actually the #1 crop.