True.
there will be more chemicals I.e. neurotransmitters present. e. g. of neurotransmitters is acetylcholine (AcH).
if action is repeated, more neurotransmitters will be synthesized at the axon terminals to be secreted into the synaptic cleft or muscle terminal ends which ends in a response.
I'm pretty sure it's photosynthesis, as photosynthesis actually takes carbon from the atmosphere to make glucose.
The feature that separates hominids from other primates is Complex social skills
