You have to tell us which words are underlined, but I have a feeling the words were "a popular author of children's books." which is an appositive. Author is the same thing as Shel Silverstein.
I don't get what your trying to say
Explanation:
yixyixyixyixyixyixyixitixi
joyful, glad,happy one of those should work
Answer:
feet is the answer
Explanation:
because if you are talking and you are talking about someone's feet the last time you saw the person you say feet
