Which sentence does not have a noun phrase underlined? everyone needs a tent for the hiking trip everyone needs snacks and water for the hiking trip. everyone needs shoes with good support for the hiking trip. everyone needs a sleeping bag for the hiking trip.

The correct answer is: Everyone needs snacks and water for the hiking trip.

A noun phrase has the same purpose as a noun, it is the object or subject of a verb and the object of a preposition. A noun phrase is a noun that comes with a modifier that helps to identify the noun, the modifier can come before the noun (possessive pronouns, articles, adjectives and possessive nouns), or it can come after the noun (prepositional phrases, participle phrases, infinitives or adjective clauses).  

Explanation:

A tent is the noun phrase, the noun itself is: tent, and the modifier is: a

Snacks and water is the noun and it doesn't come with a modifier to help distinguish which snacks and water the writer means.

Shoes with good support is the noun phrase, shoes being the noun and with good support being the modifier that helps distinguish which kind of shoes.

A sleeping bag is the noun phrase, the noun in this sentence is sleeping bag, and the modifier is a.

pulling in the reader is important

maybe i could if you provided more information, such as a image of the text? (;