Which claim would be covered under the Homeowners' Basic Form for damage caused by attempted theft?

The Homeowners' Basic Form typically provides coverage for damage resulting from various perils, including attempted theft. In the context of this question, the coverage pertains specifically to damage caused when someone tries to break into a residence.

When evaluating the answer, damage to the door and lock signifies an attempted break-in which directly correlates with the provision for losses due to attempted theft. The intent to commit theft, even if it is unsuccessful, still results in property damage that the policy is designed to cover. This reflects the principle of protecting the insured's property from the consequences of criminal acts.

In contrast, theft of a pet, coverage related to unoccupied seasonal dwellings, and theft of building materials do not align as closely with the coverage provided under the Homeowners' Basic Form for damage due to attempted theft. The policy typically does not extend to coverage for personal property that is not explicitly included, such as pets, or to thefts occurring in specific circumstances like those involving unoccupied dwellings or building materials prior to completion. Thus, the best choice is the damage resulting from the attempted break-in.