Answer:
<u><em>Hey there the correct answer to this is A Solution</em></u>
Hope it helps! ;)
You have not given the concept map. But I think it might be this one. So, according to this concept map, the answer should be B. H2O and CO2
The answer you are looking for is called Serotonin. Please put this as the brainiest answer thank you and hope this helped.
Calls Can Get Damaged, OR Age And Die. We Wouldn't Be "Us" If We Didn't Have Cells. Hope That Helps