Which landform is a result of rapid changes to Earth’s surface? A U-shaped valley
B Limestone cave
C Mountain range
D Volcanic island

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.

answerca air mass;