Answer:
The correct answer is
B) mixtures; pure substances
Explanation:
Filtration is a process that can be applied to solids or other larger size particles suspended in a mixture containing one or particles of different sizes such as solids in liquids or gas such that the liquid is meant to pass through the tiny holes on the filtering medium or mesh. The liquid that passes through the filtering medium is known as the filtrate
As such filtration can only be used to separate particles of mixtures containing particles of different sizes but it cannot be used to separate particles of a pure substance which has particles of only one size
