To "remonstrate" means to:

To remonstrate means to protest or express strong disapproval or objection to something. This term is often used in contexts where individuals advocate against a decision or action, articulating their concerns or dissent. The action of remonstrating typically involves a vigorous and earnest appeal to the authority or party responsible for the issue at hand. In legal or formal settings, remonstrance is a crucial component of advocacy where parties involved may need to voice their objections effectively to influence outcomes.

The other options do not capture the essence of "remonstrate." Forgive involves letting go of resentment or forgiveness toward someone, which is quite different from asserting a stance of protest. Showing pertains to displaying or presenting something but does not imply any objection or discontent. Duplicating means to make an identical copy of something, unrelated to voicing complaints or objections. Thus, the meaning of remonstrate aligns most accurately with the concept of protest.