The geosphere refers to the crust mantle core all of the above, at the same time.

All the above is the answer

The speed of  sound:   sound travels  at different speeds depending on what it istraveling through. of the three mediums (gas, liquid, and solid)  sound waves travel the slowest through  gases, faster  through  liquids, and fastest  through  solids.

This movement is also referred to as  glacial plucking