A. Carbon
It's carbon because it is in all plants and fossil fuels. Hope this helps and is correct.
The correct answer is A. This is because undeveloped meaning they don't have access to any of the other offered answers
Where’s the list? Put it and I’ll help.
Answer: PLEASE MARK ME AS BRAINLIST
Explanation:
The cell was first discovered and named by Robert Hooke in 1665. He remarked that it looked strangely similar to cellula or small rooms which monks inhabited, thus deriving the name. However what Hooke actually saw was the dead cell walls of plant cells (cork) as it appeared under the microscope.
the German botanist Schleiden proposed that all plants are made up of plant cells. Thank you.