The noun phrase in the sentence "My close friend went to Nigeria" is the phrase "my close friend". This is a noun phrase because a noun phrase is a group of words that ultimately function as a single noun in a sentence. In this case, the words "my" and "close" only add to the common noun "friend" and makes the phrase a noun phrase. Here are some other examples of noun phrases:
- The small, silly dog
- The warm, fuzzy blanket
- Her long, dark hair
Hope this helps and good luck on your assignment.