What term describes a portion of a rabbit's pelt that lacks fur?

The term that accurately describes a portion of a rabbit's pelt that lacks fur is "Bare Spot." These bare spots can indicate various conditions such as stress, skin infections, or parasites, and understanding this term is essential for rabbit care, as they can impact the rabbit's health and appearance. Recognizing bare spots enables caregivers to investigate potential underlying issues that may need attention.

The other choices do not specifically refer to areas without fur on a rabbit’s body. "Base Color" refers to the primary color of the rabbit's coat. "Back" describes a specific anatomical location on the rabbit but does not denote any absence of fur. "Belt" is not a term typically associated with rabbit fur and does not relate to the description of fur coverage. Therefore, "Bare Spot" is the most fitting term for an area of missing fur.