Answer:
A hydrogen atom is an atom of the chemical element hydrogen.Carbon is a chemical element with the symbol C and atomic number 6. It is nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds.
In chemistry, an element is a pure substance consisting only of atoms that all have the same numbers of protons in their atomic nuclei.
Explanation:
A cell is the smallest basic unit of life
Answer: plants
Explanation: it’s simple, photosynthesis
I think it’s D vacuoles, I’m not certain but it don’t hurt to try if it’s not that try A