Answer:
A
Explanation:
zygote is the merged gametes of different organisms 
 
        
                    
             
        
        
        
A rock that forms when magma hardens beneath Earth's surface is called an intrusive igneous rock.
        
                    
             
        
        
        
Parasitism bc the warbler's young are being displaced which means that the warblers are suffering harm through the loss of their young. 
        
             
        
        
        
<span>Osteoporosis is most likely to be affected by : Phosporus cycle.
 basically, our skeleton are the warehouse of two substance, calcium and phosporous. If our skeleton has insufficient amount of these two susbtance, it will weakened its composition and caused the osteoporosis</span>