The first one was Democritus in the time of Ancient Greece. At the time he had no evidence though, just a lucky guess made by him.
Answer: The correct answer is option C
FACILITATED DIFFUSION.
Explanation: FACILITATED DIFFUSION is a form of passive transport,it is the process by which substances(molecules) move from a region of higher concentration to a region if lower concentration along their concentration gradient through the help of a membrane transporter forming a pore or channel(Protein).
Facilitated diffusion dies not require high energy to occur since a concentration gradient is involved.
They are called stimulants. Examples include nicotine and caffeine.
Chemical energy is stored in the battery cells and converted to electrical energy when it's needed by the toy robot
