Final answer:
The word 'cultivate' in the provided sentence means to encourage development by attention or study, aligning with nurturing a love of books in children through reading.
Step-by-step explanation:
The correct definition that matches the word used in the sentence 'Parents can help cultivate a love of books in their children by reading to them each night.' is:
- v. To prepare land for the growing of crops
- v. To grow or to help to grow
- v. To encourage development by attention or study
This usage of the word cultivate pertains to fostering growth or development, which in this context is referring to a love of books. Thus, it is not about literal agriculture or cultivation of the soil, but rather nurturing an appreciation for literature through regular exposure and engagement.