Either mechanical or physical. I would say physical though.
The answer is b, to stregthen muscles
Answer:
PARASITES.
Explanation:
At some point in their lives, many pets experience discomfort caused by external parasites such as fleas, ticks, or mites on their skin or in their ears. These parasites can be extremely irritating to pets and can cause serious skin problems or even carry disease.
Explanation:
Her nervous system doesn't allow her a quick response to pain however she can a will feel the pain in the long term.