What is biological magnification and bio concentration?

Biological magnification is when the concentration of something (like a chemical or something hazardous) is more concentrated within the levels of the food chain. For example,  you have a fly that was consumed by a frog. The fly had a toxin within their body and now the frog has it. It continues to become more concentrated in the frog. The frog is consumed by a bird. The birth now has a more concentrated level of toxin. The bird is then consumed by a human. There is now more concentration within the human.

Bio concentration is related to the water. It's when the concentration within the water is filled with a toxin and the life within the water has a higher concentration within their body.

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explanation:

americans began to notice growing differences between the northern and southern sections of the country. there were more people living in cities in the north, which made it more urban. more people lived on farms in the south, which made it more rural. while many people were farmers in the northern states, there were now other ways to make a living, such as working in mechanical cotton gins factories manufacturing cloth, tools and other goods. people in the north supported high tariffs on goods imported from europe because the extra cost encouraged people to “buy american” instead. in the southern states, planters did not like tariffs because they sold most of their production to europe and bought their tools from there as well. southerners believed the protective tariff was something that only northern factory owners keep their profits high. so the southern politicians came up with an idea. they would opt out. they would simply ignore the protective tariff. it was ‘null and void’ in south carolina. the state would not collect the taxes on goods imported into south carolina, no matter what the president said they had to do. this decision led to the nullification crisis.