The factor that slows down the rate of reaction is decreased temperature, as it reduces the kinetic energy and movement of particles. Other options provided would either have no effect or increase the reaction rate. Temperature is a crucial factor in determining reaction speed. ;
The factor that slows down the rate of reaction is decreased temperature, as it reduces the kinetic energy of particles, leading to fewer collisions and slower reactions. Other factors like volume reduction, increased surface area, and enzyme usage either have no effect or increase the reaction rate.
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