pick the correct word from the drop-down. her book was illustrious, illustration, illustrative of 18th century prose.

Her book was illustrative of 18th century prose.

Explanation:

Let's take a look at the meaning of each option and use elimination.

1. illustrious:  notably or brilliantly respected and admired because of dignity, achievements, or actions. --> We can eliminate this option. It is very hard to imagine a book being illustrious.

2. illustration: a picture or an example helping make something clear or attractive. --> Even though this option makes more sense than the one above, we need to pay attention. "Illustration" is not an adjective, but a noun. To correctly complete the sentence, we should choose an adjective. In order to use this noun, we would need the article "an", which the sentence does not have.

3. illustrative: serving as an example or explanation; explanatory. --> This is the best option. It makes sense for a book to explain something, or to be an example of a type of literary work. In this case, her book is an example of 18th century prose.

the answer should be the first one. "many people find his lyrics very moving."

it by far makes the most grammatical sense and is very objective, removing any first person from the original sentence and keeping with the sentence fluency.