a system that is used to move people and products an enterprise that changes raw materials into goods the building and finishing of structures the conversion of mechanical energy into heat energy
I gave my students this multiple choice question: Which best describes transportation technology?

Only one answer is correct among these 4 choices:
- a system that is used to move people and products
- an enterprise that changes raw materials into goods
- the building and finishing of structures
- the conversion of mechanical energy into heat energy

Could you tell me which one is correct?

a system that is used to move people and products