Which form provides additional coverage for improvements made by the tenant?

The correct choice highlights that the DP-3 form provides additional coverage for improvements made by the tenant because it is a more comprehensive policy known as an open peril or special form. This means it covers a broader range of risks, including those improvements and betterments made to the rental property, as well as the personal belongings of the tenant.

In the context of personal lines insurance, tenants often make modifications or improvements to the space they are renting, and the DP-3 recognizes the value of these enhancements. It protects against a wider array of incidents that could damage both the building and the tenant's investments in improvements, rather than limiting coverage to specific perils or situations.

In contrast, the DP-1 and DP-2 forms provide more limited coverage options. DP-1 offers basic coverage with a named-peril approach and does not cover all potential damages to improvements made by the tenant. DP-2 is an upgrade but still does not match the protection that DP-3 offers for tenant improvements, as it typically expands on named perils but may not cover as extensively as an open-peril policy. Thus, the DP-3 stands out for its comprehensive approach to tenant improvements and betterments.