It is important to know the division or phylum of the various plant species growing in your backyard so as to determine whether they will spread and ruin other crops and plants of yours. Not every plant is beneficial, so you need to know which ones to keep, and which to deplant. 
        
             
        
        
        
Answer: It is A 
Explanation: It is A because the television gives off light and sometimes that could heat up the tv and it is sound because obviously television makes sounds because of the volume :) hopefully that helps.
 
        
             
        
        
        
The answer is b, for he is comparing the two rocks to find an age relative to the other