To create a better image in the reader's mind. The use of imagery creates a better picture when the reader imagines the setting. Since when reading everyone thinks of a different picture imagery helps to create a picture closer to what the author imagined.
D. because he is comparing them to hounds as a metaphor because they are hungry for money as would hounds be hungry for meat
1. Show Your Pet Lots of Attention.
2. Feed and Water your pet.
3. Clean up after your pet (all the messes your pet makes)
4. Play with your pet. Have fun with your pet.
Hopes This Helps. :)
You didn't specify what kind of pet, so I used things that all pets would need.