People! We (humans) die and why do animals have to die?

Well we are different than animals in one important way: we can think about spiritual things, we can worship Jehovah God, we sin. Animals cannot live the same way we can and they don't 'sin' but they are limited in their lives and thinking. Some animals can live for a very long time but what would be their purpose if they never died? Humans can do so many things and we can have the purpose of living to focus on Jehovah God and live to please him so that we can live forever as God purposes. I hope this answered your question and you have many other great answers!