I am afraid there is no specific answer to your question becuase there is not only one fell good chemical, there are 4:
Endorphin, Serotonin, Oxytocin and Dopamine.
Hope it helped,
Happy homework/ study/ exam!
Cause when viruses disperse there gone to evolve then come back once they evolved to try to make things sick yet again.
Answers are:
a) upper motor neuron b) lower motor neurons
I am positive it is C, so so so sorry if I’m wrong but it should not be
