Get expert advice and insights on any topic with IDNLearn.com. Get accurate and comprehensive answers to your questions from our community of knowledgeable professionals.

Petroleum is called a fossil fuel because it is...
1.found in mines containing the skeletons of prehistoric animals
2.a form of stored sunlight produced by organisms that lived long ago
3.a mineral resource produced by combining two chemical elements
4.a long-lasting renewable resource from deep wells