Final answer:
In dogs with Ehlers-Danlos syndrome, the characteristic of skin fragility is an increased susceptibility to bruising and tearing.
Step-by-step explanation:
The characteristic of skin fragility in dogs with Ehlers-Danlos syndrome is D) Increased susceptibility to bruising and tearing. Ehlers-Danlos syndrome is a genetic disorder that leads to a deficiency in type-III collagen due to potential deficiencies of the enzyme hydroxylase or mutations in amino acid sequences during collagen synthesis. This results in the progressive deterioration of collagen, which, among other complications, causes the skin to become fragile, leading to easy bruising and tearing upon minor trauma.