The childrer 's books are already marked. The underline d word is a __ a. possessive noun b. feminine noun c. first person noun d. singular noun

## Step 1<br />The problem is asking us to identify the type of the underlined word "children's" in the sentence "The children's books are already marked". <br /><br />## Step 2<br />The word "children's" is a possessive noun. This is because it is showing ownership of the books by the children. <br /><br />## Step 3<br />The word "children's" is not a feminine noun. Nouns are not categorized as masculine, feminine, or neutral based on their spelling. Instead, they are categorized as masculine, feminine, or neutral based on their meaning. <br /><br />## Step 4<br />The word "children's" is not a first-person noun. First-person nouns are used when the speaker is talking about themselves. <br /><br />## Step 5<br />The word "children's" is not a singular noun. The word "children" is plural, and the "s" at the end indicates that it is plural possessive.