Answer:
reactions
Explanation:
Reactions occur when two reactant molecules effectively collide, each having minimum energy and correct orientation. Reactant concentration, the physical state of the reactants, and surface area, temperature, and the presence of a catalyst are the four main factors that affect reaction rate.
Collections of nerve cell bodies inside the CNS are called nuclei
The answer is b equal and opposite horizontal forces
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I'm not sure if there were supposed to be options or not.
However, I believe the answer would be evaporation.
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