Correct Answer: Establish

Solution : The correct choice is the first option.

Abrogate means to officially revoke or repeal a law, agreement, or formal decision. Establish means to set up, create, or bring into existence something that typically endures or continues over time, which makes it the opposite of abrogate.

The meanings of the other options are as follows:

• Eradicate means to destroy, eliminate, or get rid of something undesirable or harmful.
• Demoralise means to undermine someone's confidence, spirit, or morale, typically by causing discouragement, disheartenment, or a loss of hope.
• Sabotage refers to the deliberate act of causing damage, disruption, or interference to something, such as a plan or activity, to hinder its success or effectiveness.