The theme is the writer's view of or comment about the subject. The answer to your question is D. I hope this is the answer that you are looking for and it comes to your help.
Im gonna answer the ones i stufied in grade5 and back soo question 2 a food web question 4 they break down dead and decaying organic material question7 omnivores
Reactants. Reactants are the substances that are needed for a chemical reaction to occur. Without reactants there are no products.
The main reason for the species extinction is for the ecological changes.
