Answer: The two squirrels ---> Noun phrase
To my sister ------> Not a noun phrase
All styles of dance ----> Noun phrase
My water ----> Noun phrase
Explanation: <u>A noun phrase is a group of words that has a noun or an indefinite pronoun as its head</u>. It can also include premodifiers and/or postmodifiers. Moreover, <u>in most cases, a noun phrase can be replaced with a single pronoun.</u> <u>"The two squirrels", "all styles of dance" and "my water" </u>are all noun phrases because<u> they have nouns as heads (</u>"squirrels", "styles" and "water" respectively). Furthermore, the three of them have been premodified, but only "the two squirrels" and "all styles of dance" have been postmodified. <u>They can also be replaced with a single pronoun</u>: "they" instead of "the two squirrels", "them" in place of "all styles of dance" and "it" instead of "my water".