Answer:
The answer is Citric Acid.
Explanation:
Citrus fruits auch as lemon, orange, etc. It can be used in food or making juices as drink
 
        
                    
             
        
        
        
Gravity only depends upon the mass of an object. 
        
                    
             
        
        
        
Answer:
cooling of lava or magma makes igneous 
sedimentary rock is formed when sediment gets deposited, and is hardened by compaction and cementation.
any rock can turn into a metamorphic rock when exposed to extreme heat and pressure 
 
        
             
        
        
        
Answer: transporting substances in a cell
Why: In eukaryotic cells, endomembrane system refers to the set of membranes present inside the cytoplasm which form single functional and developmental unit. The membranes are either connected directly or indirectly and exchange material with the help of vesicle transport. The main function of this system is to modify, pack and transport the proteins and lipids in and out of the cell. The main organelles which form the endomembrane system are- nuclear membrane, endoplasmic reticulum, Golgi apparatus, lysosomes, and vesicles.