Answer:
I am not sure about 7) but I know the rest
Step-by-step explanation:
7) I think it is because both eat each other. (Eventually). For example, the wolf eats some sort of decomposer, but when the wolf dies the decomposer eats the wolf remains.
8) A producer creates its own food. Most producers are plants, and they use photosynthesis to create the sugar they need to survive. (you should know how photosynthesis works)
9) A consumer eats producers, and other consumers. A bunny is a consumer because he eats plants, and plants are producers. A wolf is a consumer because he eats a bunny.
I hope this helps :D you can come at me in the comments if you don't like me. :)