Question

______ Is a chemical substances which alerts the speed of chemical reaction​

Answer 1

$\huge\bold\pink{Answer}\rightarrow$

$\large\bold{-Catalysts}$

~ Catalysts are substances which change the pathway (mechanism) of a reaction which in turn increases the speed of a reaction by lowering the activation energy needed for the reaction to take place.

Catalysts is a chemical substances which alerts the speed of chemical reaction.