Answer:
A. fuel mileage and longevity           
Explanation:
            For a person purchasing a car, car longevity is one of the main concern. They are also interested in many things such as maximum mileage and service life. 
            By properly monitoring and assessing few measures one can maintain the efficiency and longevity of the car. One such thing is by monitoring the liquid levels of the car. Certain liquids like the coolant or radiator water level should be well maintain in proper level in order to run the car economically.
Thus by doing this, one can optimize the car's longevity and the fuel mileage.
Hence the correct option is (A).
 
        
             
        
        
        
Answer:
the moe weight you have in the marble, the higher the speed on the way down
Explanation:
 
        
             
        
        
        
Answer:
Since steel contains iron (a magnetic metal), the magnets will attract the steel cans since aluminum is not magnetic. This is used to separate the steel cans from the aluminum cans so they can be recycled separately.
 
        
             
        
        
        
Can you write this better and from my info of what i know i know that one way is the trenches in the ocean like marianas trench  <span />
        
             
        
        
        
Probably for the umbilical cord that connects babies (from their early stages in the womb to their removal) to their mothers. The cord is cut, forming the belly button. This is analogous to astronauts in space.