The correct answer is A. concealment . In insurance, concealment means an applicant or insured intentionally fails to disclose a material fact that should be made known to the insurer. A material fact is any information that would affect the insurer’s decision to issue the policy, set the premium, or determine the scope of coverage. Because insurers rely on full and truthful disclosure during underwriting, concealment can be treated as a form of misrepresentation and may give the insurer grounds to deny a claim or rescind the policy, depending on the circumstances and applicable law.

The other choices do not match this definition. Estoppel is a legal principle that can prevent a party from asserting a right when its own actions have caused another to rely to their detriment. Remission is not the standard insurance term for withholding information in underwriting. Twisting is an unfair trade practice involving inducing a policyowner to replace existing insurance using misleading comparisons. Since the question asks specifically about intentionally withholding information from an insurer, the correct term is concealment .