Answer:
this is chemistry not biology
The answer you are looking for is called Serotonin. Please put this as the brainiest answer thank you and hope this helped.
1. They have a slimy skin in which the oxygen gets dissolved. 2. The frog have lung instead of gills 3. They have enormous no. of nerves which help them to breathe through skin
I would go for D or A! :)
Water is the universal solvent.
water is called the "universal solvent" because it dissolves more substances than any other liquid and is found as a solvent in a variety of solutions.
