Which change will speed up a reaction?

decreasing the concentration of a product

decreasing the temperature

increasing the concentration of the reactant

decreasing the concentration the reactant

Increasing the concentration of the reactants

Explanation:

Increasing the concentration of the reactants will increase the effective collisions of the reactants which will lead to an increase in the reaction rate

what are the óptions. pléase list them

fire could start, buildings collapsing, and ash falling from the sky.

explanation:

this is because the buildings or plants could catch on fire and the buildings would most likely collapse. lastly ash would fall because all the burning would cause ash to fall from the sky.

hope this .