In California, the answer to an eviction, also known as an unlawful detainer, is a legal response filed by the tenant in response to the landlord's eviction lawsuit. The answer must be filed with the court within a specific time frame after the tenant receives the summons and complaint. In the answer, the tenant addresses each of the landlord's claims, either admitting or denying the allegations. The tenant can also assert any legal defenses or counterclaims they may have. Filing an answer is crucial for the tenant to protect their rights and have their side of the case heard in court, potentially preventing the eviction or negotiating a resolution with the landlord. Failure to file an answer may result in a default judgment in favor of the landlord.