Final answer:
True, the decline in the number of animals euthanized is partly due to increased adoptions, reunifications of strays with owners, and the prevalence of spaying and neutering. Selective breeding also plays a role in domestication, but must be regulated to avoid health issues. The debate on ethical treatment and regulations in animal welfare continues.
Step-by-step explanation:
The statement that the decline in the number of animals euthanized can be partly attributed to an increase in animals being adopted and an increase in the number of stray animals reunited with their owners, along with increased prevalence of spaying and neutering, is true. These factors help to reduce the number of unwanted pets in shelters and consequently the number that needs to be euthanized.
Furthermore, efforts such as selective breeding have played a role in the domestication of animals and desired trait propagation. However, it is essential to avoid inbreeding among domesticated animals, as this can lead to health issues. For example, excessive selective breeding for certain traits has led to conditions like hip dysplasia and other congenital diseases in pets over time.
While advances in the protection of animals used in the medical industry and other sectors of society contribute to the well-being of animals, the ethical considerations and potential reforms continue to be a subject for debate. Recognizing that most animals lead lives in good health and tranquility, societies are encouraged to continue exploring and implementing more humane practices and regulations.