I think it’s all of the above because they can all be found in the air and in water sources 
 
        
             
        
        
        
Answer:
The answer to your question is below
Explanation:
Balance the following equation
                           1  N₂    +   3 F₂     ⇒   2 NF₃
                                    2  -   N    -   2
                                    6  -   F    -   6 
 
        
             
        
        
        
Answer:
Food for the plant and the ground soil around the plant will get nutrients.
Explanation:
 
        
             
        
        
        
The pit that marks the location of the umbilical cord after birth is known as the navel or belly button. All animals that grow placenta during fetal development will have a navel or belly button. The scientific name of the structure is the umbillicus. It can be a depression in some individuals or raised in others.