A. Insulin as it is a human hormone produced in the pancreas to the liver....
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<span>Enzymes lower the activation rate of a reaction, thus lowering the energy needed to start a reaction.</span>
Wood, when dry, stores chemical energy. This chemical energy is released as the wood burns, and it is converted into heat, or thermal energy. This also produces light energy. As a result of burning, the wood turns into an entirely new substance - ashes. Wood, a form of fuel with lots of potential energy stored in its covalent bonds, will react with molecules of oxygen in the air in a dramatic chemical reaction we call fire. The complex molecules in the wood have 'high energy' covalent bonds, as do the molecules of oxygen.
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The answer is B. molecules move slow or fast depending on the temperature
