Answer:
1) 2
2) 1
3) B
4) Released, the products' energy is lower than the reactants'.
Explanation:
Think of the activation energy as a hill, and the reaction pathway as a marble rolling down said hill. The hill is usually harder for the marble to get over and thus takes a lot of time. When an enzyme is added however, the hill becomes smaller, making it easier and quicker to get over.
