Oxygen is what plants release into the atmosphere
        
             
        
        
        
I’m pretty sure the answer is A, but it could be D
        
                    
             
        
        
        
Do you mean sediments??? 
the type of rock formed from sediments is called sedimentary rocks
        
             
        
        
        
Answer:
a stationary front moves when a cold front or warm front stops moving this happens when two masses of air are pushing against each other but neither is powerful enough to move the other winds blowing parallel to the front instead of perpendicular can help it stay in place.
 
        
                    
             
        
        
        
The answer is an overhunting.
<span>The bottleneck event means drastic reduction of the population size because of environment changes. The consequence of this is the reduction of genetic variation. The bison population is a good example of the population bottleneck. The bison population drastically reduced its size due to overhunting which culminated at the end of the 19th century, when bisons almost extinct. </span>