Sentence (i) has been shortened in sentence (ii) by using a(n) _______.

(i) She likes a location that is in the sun.
(ii) She likes a sunny location.
A. prefix C. phrase
B. adjective D. connective

There's no prefix or connective in sentence (ii) -- so it must be either phrase or adjective.

Both of those answers could be right -- although I prefer B. adjective since you've used "sunny."

The correct answer is C. phrase.

In this case, sentence (i) has been shortened in sentence (ii) by using a phrase. Specifically, the phrase "that is in the sun" has been condensed into the single word "sunny" to convey the same meaning. The phrase in sentence (i) provides additional details about the location, specifying that it is in the sun. By using the adjective "sunny" in sentence (ii), the same information is conveyed in a more concise and direct manner.