explain why amphibians are good early warning devices for water pollution.

Because when the water gets bad they start to die. So then we know that the water is bad

If there are no living amphibians in a water source that probably means that the water is polluted. This is because they probably moved or they all died because of the pollution.

Hope this helps stay safe and have a great day! :

by looking at someone you know and chat with them or look on something like a painting or anything then the person or bring a book with you and act like you reading something or think about something that you like so you can spaceout and not put attention to what is happening around you .