Final answer:
The word that correctly fills in the blank is 'cultivan', which means 'they cultivate'.
Step-by-step explanation:
En Kansas, ellos cultivan mucho maíz para comer.
In this sentence, the correct word to fill in the blank is 'cultivan', which means 'they cultivate' in English. This verb is used to indicate that someone is involved in the cultivation or farming of something, in this case, corn. The word 'pastan' (option B) means 'they graze', which is not suitable in this context.
Therefore, the correct answer is option C: cultivan.
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