Answer: B) Natural gas
Renewable resources are those natural resources which never run off and can be easily replenished. Natural gas is a non renewable resource because it can not be replenished easily in the time frame it is consumed. Natural gas is considered as a fossil fuel as it is formed by the dead remains of plants and animals which lived on earth millions of years ago.
To obtain it naturally, it will retake millions of years. Thus, it is not considered as a renewable resource.