The two arteries that support the brain are the vertebrals and internal carotids. Hope this helps! 
Can u plz mark me as brainliest?
        
             
        
        
        
Answer:
A
Explanation:
D is not correct because the atmosphere doesn't expand, C isn't correct because the Sun doesn't heat all the Earth evenly (hence different climates), B is not correct because cold fronts can be singular, so it has to be A
 
        
             
        
        
        
Living systems follow the laws of conservation of mass and energy by <span>stating that </span>matter<span> is not created nor destroyed as a result of chemical reaction.
I REALLY hope this has helped you!!! :)
(If you can, please rate as Brainliest answer! If you could, that would make my day!!!!)</span>
        
             
        
        
        
The best conclusion to this that I see is that in this situation the plants being spoken to and hand watered every day grew better.
My Conclusion: Plants that are given more attention, and loved to grow faster and better than plants that are not.