Carcass is the dead body of an animal an hence Option D is the correct one.
Option A; Mind is the element of a person that enables them to be aware of the world and their experiences.This is an incorrect option.
Option B; Association is a group of people organized for a joint purpose.This is not the meaning of the aforesaid word and hence this is an incorrect option.
Option C; Soul is the spiritual or intermediate part of a human being.This is an incorrect option as this is not the meaning of the mentioned word.