Rate Constant and Polar solvents

Hello!

In Kaplan Ch. 5, it says that polar solvents are favored because it increases the reaction rate. However, I am struggling to grasp the concept behind it. Is it because in polarized bonds the electrons are pulled to one atom causing it to lengthen which then causes it to weaken( unequal electron density?) why the reaction rates increase? Just trying to make sure my thinking it correct here.



Thanks for your help!