Answer:
the sampling method because it involves continuing the total of numbers or organism.
There are
50 protons in tin
50 electrons in tin
And 69 neutrons
Hope this helps
B. tears , this is not a first line of defense
A buildup of pesticides could get into an animal. That animal will be killed by a hunter. The hunter eats the animal with the pesticide. The hunter then becomes sick. This is just an example but you can see what i'm getting at.
