the answer for number 12 is 1.00 g/mL
The law of conservation of energy is where energy is distributed or transported to other objects or things, and energy is never destroyed or created. It would be C because it talks about while driving the thermal energy of the engine is being used and goes into the air. The others dont explain the transfer of energy as well. I hope this helps.
A. It is responsible for keeping the back and legs straight in line when you're related.