The car changes speed. The car engine gets hot. The car stops quickly. The car slides on slippery streets.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: A car may produce many forms of energy from the fuel it uses. Which indicates that a car does not use fuel with 100% efficiency?
Possibilities:
- The car changes speed.
- The car engine gets hot.
- The car stops quickly.
- The car slides on slippery streets.

The car engine gets hot.