I think the answer is coastal sediment
        
             
        
        
        
<span>metabolic
carbon balance and zonation of sublittoral
macroalgae </span>
 
        
             
        
        
        
Answer: I think number 2 b
Explanation:
 
        
             
        
        
        
The oldest oceanic crust is found at the mid-ocean ridges. Thus, option "A" is correct.
<h3>How old is the youngest oceanic crust?</h3>
The ocean crust is about younger than 200 million years (for example, smaller than 5% of the age of the earth). 
The crust is most naive (still being created by volcanic eruptions) along the axis of the mid-ocean ridges and increases in age down the sides of the mid-ocean rises and out onto the more serious basin floors.
Thus, option "A" is correct.
To learn more about oceanic crust  click here:
brainly.com/question/1101764
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