I want to know the answer to the following question:
Under what category does oil and gas exploration fall?
All the background I'm provided with is that "The Houston–The Woodlands–Sugar Land MSA's gross domestic product (GDP) in 2012 was $489 billion, making it the fourth-largest of any metropolitan area in the United States and larger than Austria's, Venezuela's, or South Africa's GDP.". Is that enough to answer the question?
Answer: no