Coal is considered a nonrenewable resource because A) it can never be replaced
B) it comes from the impact of meteors with the Earth
C) it was mismanaged by humans; it used to be a renewable resource
D) it takes millions of years to form

Many body systems work together for proper functioning of the body and to maintain internal homeostasis. the works to break down food eaten before exercising. the takes in the nutrients obtained from the food. the body sweats as a mechanism to cool off, because the is working to flush out toxins.