In which of the following scenario is chemical energy being transformed into thermal energy

There are no scenarios here to chose from so I can give an example.

When a natural gas is burned heat is realised which causes the molecules to move faster creating a thermal energy out of a chemical energy.

i believe the answer would be b. hope it : )

the water is warmed up by the sun and then it evaporates into the atmosphere. the sunlight warms the water by its heat. water is then cooled down and condensation takes place. the water then finally returns back to the earth by the process of precipitation in the form of rain or ice.

explanation: