Solution:
Iron filings from a tea mixture can be separated by a magnet.To separate iron filings from the mixture, wrap a magnet in plastic and move it through the mixture, the iron filings will stick to the magnet. The process by which fine particles are removed by passing them through the holes of the sieve is known as sieving. The process in which solid, liquid or gas are removed by using a filter medium called filtration. Hand-picking is the method in which particles in the mixture can be separated by just picking them out with the help of a hand.