Answer: A caravan of camels takes tourists into the desert near the city of Jaisalmer in India.
Explanation:
The subject and the verb must always agree in number. If a noun is singular, the verb must be singular as well. In this case, the noun phrase 'a caravan of camels' is the subject, which performs the action of the main verb. Since word 'caravan' is the head of this phrase, and it is singular, the verb form must be singular. It is, therefore, correct to say that "a caravan of camels takes tourists into the desert."