Um help plz quickly lol

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

What does a particular point on a line of a phase diagram represent? o a. the maximum temperature a substance can exist at without bonds breaking b. the pressure created by the kinetic energy of molecules at a particular temperature c. the melting point or boiling point of a substance at a specific pressure d. the conditions in which temperature and pressure have equal effects on a substance

Structure of the atoms: discovery of the nucleus in 1909i need answering all of these questions