Describe the energy-related pathways of the electron transport chain and chemiosmosis. include a discussion of the energy transfers and end products.

Electron transport chain (ETC) is a series of electron carriers that transfer electrons. The terminal electron acceptor is oxygen. 
Chemiosmosis is ATP production by using the energy of transferring hydrogen ions through ATP complex.
The transfer of electrons through electron transport chain releases energy through series of oxidation-reduction reactions which result in ATP production.

The answer would be sand and gravel