Question

what is a reason that fossil fuels are often used as an energy source?
∘ animals and plants are not affected by their usage.
∘ beneficial byproducts are created from their combustion.
∘ there is an unlimited supply of them in the ground.
∘ they are relatively inexpensive and easy to produce.

Explanation:

• Analyze Option 1: Fossil fuel usage harms ecosystems, affecting animals/plants. Eliminate.
• Analyze Option 2: Combustion produces pollutants (e.g., CO₂, SO₂), not beneficial byproducts. Eliminate.
• Analyze Option 3: Fossil fuels are non - renewable; supply is limited. Eliminate.
• Analyze Option 4: Fossil fuels (like coal, oil, gas) have established extraction/refining methods, making production relatively cheap and easy compared to some alternatives. This is a valid reason for their widespread use.

Answer:

D. They are relatively inexpensive and easy to produce (assuming the options are labeled A - D in order, with the last option being D)