Correct Answer: Condemn

Solution : The correct choice is the fourth option.

Adhere means to stick or cling to something; to follow or act by rules or principles.
Condemn means to express strong disapproval of, criticise, or denounce. While adhere involves sticking to or following, condemn involves expressing disapproval or criticism, making it the opposite in meaning.

The meanings of the other options are:

• Establish: It means to set up, initiate, or bring into existence. It can also refer to proving or showing something to be valid.
• Approve: It means to formally agree to or accept something; to give one's consent or endorsement.
• Compel: It means to express strong disapproval of something; to criticise or denounce severely.

Therefore, the right answer is condemn.