Answer: A. Chemical signal
Explanation:
Chemical signal is the type of communication which coordinates actions between neighboring cells
.
This ability originated in single cells organisms and was essential for the evolution of multicellular organisms because after a cell receives a message, it is transferred across the plasma membrane and changes are brought about within the cell in response to this message.
A housekeeper I think , that's the answer
It is the nucleus that contains DNA and controls the functions of the cells
Bruh you literally just gotta look up the word and give an example