Which additional peril is covered under both basic and broad form dwelling policies?

The correct answer is internal explosion, as this peril is included in both basic and broad form dwelling policies. Basic form dwelling policies cover specific perils that include fire, lightning, explosion (which encompasses internal explosion), and others listed in the policy. The broad form extends coverage to additional perils, but it also retains coverage for internal explosion as a common risk factor.

Internal explosion specifically refers to explosions happening within the insured premises, such as due to heating systems or other appliances. This coverage is crucial for homeowners, as it addresses potential hazards that could cause significant damage.

The other choices present perils that are not uniformly covered by both policy types. For instance, vandalism is typically covered under the broad form but may not be included in the basic form. Theft is generally found in broad form policies, not in the basic. Artificially generated electricity is not a standard peril covered in either form but might be covered under specialized endorsements or additional policies. Thus, understanding the scope of coverage in various dwelling policies helps in managing risks effectively.