Answer:
The answer is ELECTRON TRANSPORT CHAIN. 
Explanation:
The electron transport chain are the series of proteins that carry electrons through the membrane of the mitochondria. Mitochondria are the power house of the cells, they are made up of two cell membranes, the electrons transport chain takes place in the inner cell membrane.
The transportation of electrons through the mitochondrial membrane is also called oxidative phosphorylation. During the process of oxidative phophorylation, the energy release is capture in form of proton gradient and this is used to produce ATP via the process of chemiosmosis.
 
        
             
        
        
        
Answer:
B.) Oceanic crust
Explanation:
The oceanic crust is generally thinner than other Earth layers. The oceanic crust is the thinnest layer of the Earth, amounting for less than 1 percentage of earth's volume.
 
        
             
        
        
        
A force is a push or a pull that acts upon an object as a results of its interaction with another object. ... These two forces are called action and reaction forces and are the subject of Newton's third law of motion
        
                    
             
        
        
        
I believe its B because bees spread pollen but take honey.