Id have to say it would be that the molecules of the perfume i guess. i learned in school that we smell because molecules of the item we smell go into our nose and the reseptors in our nose carry the smell to our brain and if we remember it a memory comes up of it.
The answer is organic matter sinking from the photic zone. The regions are called aphotic because the sun rays cannot penetrate to the depths hence no producers (photosynthetic organisms) can thrive in the regions. Therefore only scavengers, decomposers , and detritivores.
The endocrine system is composed of glands that engender and secrete hormones, chemical substances engendered in the body that regulate the activity of cells or organs. These hormones regulate the body's magnification, metabolism (the physical and chemical processes of the body), and sexual development and function.