Streamlined means less air resistance. The car will need less force so less fuel in order to overcome air resistance. This will make it more fuel efficient.
Where the question says "the four different positions", it's talking about
the four situations that are shown in the picture right next to the question.
The question can't be answered without seeing the picture.
Answer: Electrical energy is converted into other forms of energy, such as sound.
Explanation: Using the law of conservation of energy we know that energy can never be destryped it can be transferred or be transformed into from one form to another.