The correct answer is: C. are flown.
Kites are flown by children, adults, girls and boys in India. This is a popular activity in India, and kites are flown for both fun and competition. There are many different types of kites that are flown in India, and each type has its own unique design and features. Kite flying is a great way to enjoy the outdoors and to spend time with family and friends.
Option A, “are fly,” is incorrect because it is not a grammatically correct sentence. The verb “fly” must be conjugated in the third person plural form, which is “are flown.”
Option B, “flew,” is incorrect because it is in the past tense. The question is asking about what is happening now, so the verb must be in the present tense.
Option D, “flying,” is incorrect because it is a gerund. A gerund is a verb that is used as a noun. In this case, the gerund “flying” is being used as the subject of the sentence. The subject of a sentence must be a noun, so the gerund “flying” is incorrect.
Therefore, the correct answer is: C. are flown.