The correct statement that identifies a nonrenewable energy source and explains why it is considered nonrenewable is:
D Petroleum is nonrenewable because there is a fixed amount of oil underground and new petroleum takes millions of years to form.
This is accurate because nonrenewable resources, like petroleum, are finite in supply and cannot be replenished on a human timescale, unlike renewable resources such as solar and wind energy, which are naturally replenished.