In relation to vet studies and toxicology, what costs does poisoning have for animals, individuals, and businesses? What dangers do you think poisoning has for public safety?

The table below shows the elements that mainly comprise each of the four layers of earth: elements in layers layer main elements crust oxygen, silicon mantle iron, magnesium outer core iron, nickel inner core iron which of these elements make up the layer that is 0.2 to 1.1 percent of earth's total diameter?