To accomplish this, the reaction sequence includes both reactions irreversible and reversible.
Irreversible reactions are the ones that include conversion of reactants to products where the products cannot convert back to the reactants. On the other hand in reversible reactions, the reactants and products are never fully consumed (constantly are reacting and being produced).
The correct answer I think is D. The nucleus
Answer:
the answer is C, normal spiral galaxy
Species because i sreach is on google
