A. Cell membrane would be the answer.
The carbon(C) and oxygen(O2) is the reactants and carbondioxide(CO2) is the produce
"By growing a bud" is the one way among the following choices given in the question that <span>an adult hydra produce a new hydra. The correct option among all the options that are given in the question is the third option or option "C". I hope that this is the answer that has actually come to your desired help.</span>
