Final answer:
Natural gas is less volatile than oil and consists of shorter hydrocarbon molecules.
Step-by-step explanation:
Natural gas is less; shorter volatile than oil, and consists of shorter hydrocarbon molecules. Natural gas is primarily composed of methane (CH4), while oil is a viscous liquid composed of thousands of organic compounds, primarily hydrocarbons. The differences in the boiling points between natural gas and oil allow the segregation of crude oil into different fractions.