Answer:
1. Yes, Yuck 2. Yes, Your and My. 3. Adverb, sloshed
Explanation:
1. Yuck is an interjection, so that means there is a interjection
2. Both your and my are possessive in this sentence
3. Everywhere modifies sloshed, which is a verb, making it an adverb
I think the correct answer to the question being ask is A.
The singular noun in this sentence would be the word "Sand" because it's talking about the "Hot sand".
He walked across the hot "sand", hot is used to describe the word sand.
Thus your answer.... B. sand.
Hope this helps. :)