Question

which activity most likely involves the direct use of saturated hydrocarbons?
burning natural gas
dissolving salt in water
carving stone with hammer and chisel
bending steel by hand

Explanation:

Saturated hydrocarbons are a type of organic compound. Natural gas mainly consists of methane, which is a saturated hydrocarbon. Burning natural gas directly uses these saturated - hydrocarbon compounds. Dissolving salt in water is a physical change related to solubility and has nothing to do with hydrocarbons. Carving stone and bending steel are mechanical processes and do not involve hydrocarbons.

Answer:

burning natural gas