S-Waves (shear waves) are a type of seismic wave that cannot travel through liquids. They can only propagate through solid materials. Given this, the correct option is:
1. inner core, mantle, and crust
S-Waves can travel through the inner core (which is solid), the mantle (which is also solid), and the crust (which is solid). They cannot travel through the outer core because the outer core is liquid.