I need help with number 9 please I really need help it’s due by tomorrow!!

Answer:
des
Explanation:
"cereales" means cereals, therefore the term is plural
des is the proper way of saying "de les" (and the only way you should use, de les is gramatically wrong) and it represents the form the term is used in.
Bonjour !
1. des oeufs
2. du bacon
3. un chocolat chaud
4. des céréales
5. une banane
6. du lait
7. du beurre
8. un croissant