Answer:
The beaches I visited in Aruba had the same clear turquoise water that I had seen in the brochures.
Explanation:
A relative clause, or adjective clause, is a group words that has a subject and a verb. It functions like an adjective would, offering information about a noun in the sentence. This type of clause starts with a relative pronoun or a relative adverb (who, whom, that, which, when, etc.)
When we have two sentences that mention the same thing or person, we can often change one of the sentences into a relative clause. To do so, we add the relative pronoun and drop anything that is repetitive. Let's do that to the sentences that were provided in the question:
1. The beaches I visited in Aruba had clear turquoise water.
2. I'd seen the same clear turquoise water in the brochures.
Combined sentence: The beaches I visited in Aruba had the same clear turquoise water that I had seen in the brochures.
We did not need to repeat "clear turquoise water." We combined the sentences by transforming sentence 2 into a relative clause.
