Final answer:
Damage caused by freezing of the plumbing system in an unoccupied dwelling may be covered under an HO₃⁻ policy if the insured has maintained heat in the dwelling.
Step-by-step explanation:
Under an HO₃⁻ policy, damage caused by freezing of the plumbing system in an unoccupied dwelling would likely be covered if the insured has maintained heat in the dwelling.
It is important to note that each insurance policy may have specific conditions or limitations, so it is always best to review the terms of the policy to know for sure. However, in general, if the insured has taken reasonable precautions to prevent freezing damage, such as maintaining heat in the dwelling, the HO₃⁻ policy would typically provide coverage.