Final answer:
If an owner wants to be present during their pet's euthanasia, it is called witnessed euthanasia. Euthanasia aims to end suffering, can be passive or active, and may serve to provide peace for the owner as well.
Step-by-step explanation:
If an owner wants to stay with their pet during the whole euthanasia procedure and see it happen, this is called a witnessed euthanasia. Euthanasia is a practice used to end the life of a terminally ill patient in a way that is considered to be less painful or distressing. It can be categorized into different types such as passive euthanasia, which involves withholding treatment with the expectation that the patient will die sooner, and active euthanasia, which includes medical interventions to terminate life. It is important to note that in the context of humane animal treatment, the term 'euthanasia' refers to a compassionate process designed to prevent suffering, and allowing the pet owner to be present can provide closure and emotional comfort during this difficult time.