Final answer:
The word 'waiver' corresponds to option a) renunciation, meaning the voluntary surrender of a known right or privilege.
Step-by-step explanation:
The word "waiver" matches with option a) renunciation. A waiver is a voluntary relinquishment or surrender of some known right or privilege. It involves intentionally giving up a right, often in the context of legal or official matters. For example, signing a waiver form before participating in a potentially risky activity means that you relinquish the right to hold the organization responsible for any injuries sustained during the activity.