It Is Responsible for People's Happiness
This page is the CodyCross answer for the clue below from Fauna and Flora, Group 177, Puzzle 4 (Lilies and Roses).
Question is: It Is Responsible for People's Happiness
and the answer is: SEROTONIN
Word Meaning:
SEROTONIN — (biochemistry) An indoleamine neurotransmitter, 5-hydroxytryptamine, that is involved in depression, appetite, etc., and is crucial in maintaining a sense of well-being, security, etc.
Definitions from Wiktionary.