E-cigarettes, like JUUL, can leak heavy metals and residual nicotine into the environment. Because of heavy metals and residual nicotine, e-cigarettes may qualify as both e-waste and biohazard waste.
 
        
                    
             
        
        
        
Answer:
it's C because it has the commas placed at correct areas.
the rest of the sentences can be corrected below :-
a. Spider man, who is known for being able to shoot webs from his wrists, is my favourite hero. 
b. The children, who were usually happy, had become upset.
d. Peter, who is my best friend, plays the guitar and the piano. hope it helps... 
 
        
                    
             
        
        
        
Having the quality of acting impulsive or with emotion
        
                    
             
        
        
        
Answer:
use a hook such as a statistic about your subject then afterwards explain what you are going to talk about
Explanation:
hooks help people get attracted to the topic so they get interested and start to read it
ex: according to (insert website) over 1 billion animals have died in the australian fires