Yes, A is correct. Taking a shower is not an automatic bodily function
The Theory states if my memory is correct. All living things contain one or more cells. And all living cells Come from preexisting cells. Robert Hooke discovered the cell while, Theodor Schwann and Matthias schleiden are credited to the creation of the cell theroy
I believe the anwser you are looking for is the
Cell Membrane.
It is a substance that lets things in and out of the cell
