The energy change in a chemical reaction is due to the difference in the amounts of stored chemical energy between the products and the reactants. This stored chemical energy, or heat content, of the system is known as its enthalpy.
Humans are connected to life because we are living things such as plants, animals, and technically, we are animals since we are mammals. We are also breathing creatures. (Hope this helps! ~Pooch ♥)
Answer:
c
Explanation:
if there was no change, there is no way for the strongest of a species to pass on their genes as all of the species would be exactly the same and there would be no strongest