Answer:
Because of using fossil fuels nowadays it is used to air pollute the earth causing global warming.
Explanation:
<span>vaccine
The wording given is pretty much the exact definition of a vaccine. The key to how a vaccine works is that it provides to the immune system, samples of the surface proteins of the infectious materials. With those samples available, the immune system is able to produce antibodies that react to those proteins.</span>
<span>The correct answer is that a completely different protein will be synthesized. Proteins are made out of long chains of amino acids. There's 500+ of them but only 20 or so are used for humans. They have infinite amounts of combinations and each combination synthesizes a different protein. Our body knows what it needs so it synthesizes it from food that we take.</span>