What factor indicates a cavy's adherence to breed standards during evaluation?

The correct factor that indicates a cavy's adherence to breed standards during evaluation is the correct weight. Each breed of cavy has specific weight standards that are defined in their breed guidelines. When evaluating a cavy, judges will reference these standards to determine if the individual falls within the acceptable weight range for its breed. Weight can significantly impact the overall appearance and health of the animal, which is crucial during a show. Hence, adhering to the weight criteria demonstrates that the cavy aligns with the expectations and characteristics of its breed.

Other factors, like the presence of a pedigree, neat grooming, and the age of the cavy, while important in their own right, do not directly measure adherence to breed standards in the way that weight does. A pedigree can indicate lineage but does not guarantee conformity to breed standards; grooming reflects the care given to the cavy but does not influence its breed characteristics; and age might affect certain physical traits but is not a standard measure of breed conformity. Thus, weight stands out as a key indicator in this context.