Final answer:
The main verb in the sentence is 'are,' indicating the state of being of 'cheetahs'. This makes option A) are the correct answer.
Step-by-step explanation:
The question asks us to identify the main verb in the sentence: "Cheetahs are the fastest land animals with recorded speeds of over 70 miles per hour."
The main verb in a sentence is the word that shows the action or state of being of the subject. In this sentence, the main verb is 'are'. This is because 'are' indicates the state of being of the subject 'cheetahs', making it the main verb.
Options 'fastest', 'recorded', and 'speeds' are not verbs, but rather an adjective, a past participle used as an adjective, and a noun, respectively. Therefore, the correct option is A) are.