In each of the following sentences, a word is missing and replaced by a blank. Choose the best word from the given options that can fit into the sentence without altering the intended meaning.

The book had a/an _____________ impact on her perspective, changing the way she viewed the world.

The correct option is profound.

Step-by-step Explanation:

1. Analyze the context of the sentence:
The sentence describes an impact that modified her perspective and changed the way she viewed the world. This indicates that the impact was deep, significant, and far-reaching.

2. Evaluate the meaning of each option:
• profound: Very great or intense; having deep insight or meaning. Fitting this into the sentence yields: "The book had a profound impact on her perspective..." which logically and grammatically fits the context.
• tripping: Catching one's foot on something and stumbling; moving with light quick steps. This does not make sense when describing an impact on one's perspective.
• encroach: Intrude on a person's territory, rights, or personal life (verb). It is grammatically incorrect after "a/an" where an adjective is needed.
• oversea: Relating to or originating in foreign countries across the sea. This is irrelevant to personal perspective or impact.
• accurately: In a way that is correct in all details; exactly (adverb). An adjective is required to modify the noun "impact", making an adverb grammatically incorrect here.

3. Conclusion:
The word profound is the only choice that fits both grammatically and semantically to convey a deep, life-changing effect.