Because each animal originates, and the condition of the country that if we move it to the main window, and if พอากาศ or not the same environment may affect it, it dies.
Because the animals are made to suit the weather and the condition of the country if we move it to a different place and reclaimed if the weather or the environment may affect not like it, it dies.
Because each type of animals are made to fit the air and the condition of the country if we move it ต่างถิ. And if not the same air condition or environment may affect it makes it dead.