The rate of a chemical reaction normally decreases as temperature increases /is slowed down by a catalyst/ increases as reactant concentration increases/ decreases as reactant concentration increases

The rate of a chemical reaction normally... increases as the reactant concentration increases.

-- this is because as the reactant concentration increases, it increases the propensity for successful collision to take place thus increasing the likelihood of products being produced faster.

Hey how did you manage to type such a big lab report