Which change will cause the greatest increase in the rate of reaction for this chemical reaction?
8zn(s) + s8(s) 8zns(s)
adding a catalyst
increasing the temperature
increasing the surface area
increasing the concentration

The best answer to this question is adding a catalyst. 
Adding a catalyst  will cause the greatest increase in the rate of reaction for this chemical reaction , 8Zn(s) + S8(s) 8ZnS(s).

---> adding a catalyst always affects the rate of a reaction.

Probably a behavioral adaptation