What happens to most of the magma when it reaches the crust

Between 2014 and 2016, more than 25,000 children in flint, michigan, drank water that was contaminated with lead from lead pipes. during this time, the city claimed the water was safe to drink. which of these actions could the city have taken to ensure that the drinking water was free from lead?

Label a-f based on the table using c for concentrated and d for dilute

Which metal exist in liquid state and can be cut with knife ?