Examples of an inhibitor

In which layer of earth do most earthauakes occur a_ inner core b_outer core c_mantle d_crust

Margaret wants to make an orange flavored drink by stirring powdered drink mix into a glass of water. she doesn't like drinks that have small clumps of powdered solid in them, so she wants the drink to be a perfect solution. what factors should margaret not consider when deciding how much powder to add to her glass of water?

In which phase(s) do the molecules take the shape of the container?