underground creatures
Explanation:
because man never knows what is going on under water all the time
Exactly what the person above said!
I think it's D. It shields life forms on the surface from radiation?
In finding disease we must find its cause and we are made up of cells so every disease has something to do with our cells so if we understand we can know what is Poisson or what will damage it like smoking .
Hope this helps
Brainliest?