The solar system is considered a natural system because it was made and controlled by natural forces, meaning, it was never influenced with human creations. It is considered as one of the products of the phenomenon of the physical world. Hope this answer helps you.
        
                    
             
        
        
        
Answer:
The correct answer is A.) Forms the plant cell wall.
 
        
                    
             
        
        
        
Explanation:
Proteins 
<h2>Learn at brainly </h2>
 
        
             
        
        
        
Albert einstein and your mom
        
             
        
        
        
Answer:
option c
Explanation:
Vascular plants transport water and nutrients using the vascular bundles, xylem and phloem. Xylem transports the former and phloem the latter