D. Coal is naturally made and cannot be renewed by humans.
B. Soil Contamination
All the other answers are talking about clean and pure things while this answer is the only negative one. So B is your answer.
The ratio of Carbon, Hydrogen, and Oxygen are 1:2:1 in carbohydrates
The Nucleus is the control center, or brain of the cell.
Answer:
Explanation:
A food chain only follows one path of what food animals eat. A food web consists of many food chains that show how plants and animals are connected. In conclusions, a food chain focuses on a certain animal or their path and they are linear. Food webs are more complex which show how the ecosystem works together to create a balance.