"Response to stimulus" refers to A.
the reaction of an organism to a signal.
B.
processing events in the brain.
C.
the behavior of an organism in a particular situation.
D.
the five senses (sight, hearing, touch, smell and taste).

C. the behavior of an organism in a particular situation

i tried the eyeshadow trick you told me about and it worked so good i i did a yellow going into orange colors and it was bright and you could see it on my eyes

the food storage products of chrysophytes are oils or the polysaccharide laminarin.   formerly classified as plants, the chrysophytes contain the photosynthetic pigments chlorophyll a and c all but the yellow-green algae also contain the carotenoid pigment fucoxanthin.