Question

The dog slunk in the back door with his tail between his legs. Which best analyzes the meaning created by the underlined word? It implies that the dog is delighted to be home. It suggests that the dog feels guilty. It hints that the dog is excited. It suggests that the dog is ill.

Answer 1

it suggests the dog is guilty of something

if he were excited or delighted, he would be wagging his tail

Answer 2

The word Slunk implies that the dog feels guilty. The definition of slunk is "creep" or "crawl", as in slowly move. If the dog was excited or delighted to be home, he would move fast. There is no evidence in the text to suggest that the dog is ill.
Hope this helps! Have a happy holiday!