Inside the chloroplast (a membrane-bound organelle present in plant cells)
I don’t know why they make everyone type more than 20 characters but B sounds like the most reasonable answer.
HEY MATE....!
HERE'S THE ANSWER
Diffusion is a process in which particles of two or more substances intermixed with each other.
HOPE IT HELPS....
Hunger and thirst are considered to be internal stimuli.
Hope that helped you.