What does the graph show about the importance of clean air?

people have a lower risk of dying from copd when compared to acute lower respiratory infections.
the health risk is the highest for getting lung cancer when people are exposed to indoor air pollution.
most people will die from the negative health effects associated with stroke as indoor dirty air builds up.
the risk of developing acute lower respiratory infection and ischemic heart disease is the same when exposed to indoor air pollution.

the seeing the electronic configuration we can say that the element is fluorine.

fluorine is the most electronegative element in the periodic table.

but by only seeing the configuration we cannot say about its reactivity because we don't know if its configuration after excitation or by addition of electrons.

but if not then, it is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. as the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine.