Describe two types of mechanical weathering

The 2 types of mechanical weathering are
1) * Temperature Change
-Temperature change makes rocks contract and expand
-Also one of the important cause of mechanical weathering.
2) * Abrasion
-Abrasion is a process in which an external force
Example: water movement or gravity which causes rock materials grind (reduce <<< synonyms) which can break apart the outer layers of affected rocks.*PLEASE GIVE THIS A THANKS :) :D xD AND ALSO THE BRAINIST ANSWER PREETTY PLEAS, DON'T YOU EVER FEEL LIKE YOUR GING TO GIVE ME THE BRAINIEST ANSWER/CROWN??? xD 

The answer is d.potassium