Answer:
See image attached for structure of CH3Br
Explanation:
A lewis structure structure is a representation of a covalent compound in which dots are used to show valence electrons, lone pairs and bonding electrons. The system was introduced by sir G.N Lewis in 1916 in his article titled 'Atom and Molecule'. They are also called dot electron diagrams of molecules. CH3Br molecule contains a total of fourteen electrons. Valence electrons are shown by dots around the atom of each element as clearly seen in the image attached.
 
        
             
        
        
        
Explanation:
High density medium to low density medium.
 
        
             
        
        
        
Neutral solution, hope this helps :)
        
             
        
        
        
The correct answer is A.
Hunger, chemical imbalance, and blood levels are all internal issues. Cat dander on the other hand is not something the body creates or and is something in the environment.  
Thus, your answer is A. 
        
                    
             
        
        
        
Answer:
A ball of ice blasted into outer space
Explanation:
It is a ball of ice that is going so fast it leaves a "tail"