Answer:
A carbon dioxide and water
It can be C or D but I think the answer is D
B. They become extinct
Please mark as brainliest if this helped!
<span>There are other avenues to find the cure to diseases that do not involve exploiting fetuses.
</span>
Carbon is the best answer while other elements can be sodium, Lithium, or sulfur. It combines with hydrogen easily, and is the basis for all fossil fuels and organic materials.