Answer: C. State several central ideas in your thesis statement.
Explanation: If you want a strong thesis statement, you need to make sure that all three of these points are included in it. First, identify your topic and narrow it down as much as possible. Stating several might not be helpful, especially since you want to narrow it down.
Answer:
The main difference is that plants eliminate waste much more slowly and directly into the ground. Animals eliminate waste much more quickly. Also, plants are eliminating waste almost constantly but in very small amounts.