Enzymes involved in the breakdown of fats contribute to the reaction in which way? These enzymes - O eliminate toxins produced by the reaction.
O increase the speed of the reaction.
O are completely consumed during the reaction.
O reduce the reactants needed for the reaction.

...enzymes increase the speed of the reaction

Explanation:

In biological systems, enzymes are proteins that mediate chemical reactions. They increase the rate of chemical reactions, by lowering the activation energy, required for the reaction (eg. hydrolysing a bond) to occur.

Enzymes require the aid of cofactors, inorganic molecules to act as complements to enzymes. They cause structural changes that result in substrate recognition and binding. Here they act by breaking down large fat molecules into fatty acids and lipids.