Why is electrolysis used not carbon to extract metal

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

Is 9 correct? and can someone me with 10? it’s due tomorrow, you

Consider a culture medium on which only gram-positive organisms such as staphylococcus aureus colonies can grow due to an elevated nacl level. a yellow halo surrounds the growth, indicating the bacterium fermented a sugar in the medium, decreasing the ph as a result and changing the color of a ph indicator chemical. this type of medium would be referred to as a differential and enrichment culture.