Question

how does coal differ from pine trees as a source of energy?
coal can be replaced easily, while pine trees are difficult to replace.
coal is a nonrenewable resource, while pine trees are a renewable resource.
coal is a clean source of energy, while pine trees cause environmental damage.
coal is an expensive source of energy, while pine trees are an inexpensive source of energy.

Explanation:

Coal takes millions of years to form and cannot be replenished quickly, making it non - renewable. Pine trees can be replanted and regrown, so they are renewable. Coal burning releases pollutants and is not clean. Cost comparison is not the main difference in terms of energy source nature.

Answer:

B. Coal is a nonrenewable resource, while pine trees are a renewable resource.