Chloroplast is responsible for using light energy to produce sugar. It is located at the top of the leaf because that's where it will absorb the most light while it's still being protected from damage by the cuticle and the epidermis
        
             
        
        
        
I think the veins absorb the photons because they're located at the top part of a leaf while the stomata that serves as the leaf's lungs are found at the under side.
        
             
        
        
        
Answer:
a×b(aybz_azby)i+(azbx_axbz)j+(axby_aybx)k
 
        
             
        
        
        
Answer:
Explanation:
The human ear is the organ for hearing. It converts sound waves into electrical impulses through which the brain processes to facilitate our hearing. 
The ossicles inside the ear amplify sound waves they collect from the environment and transmits them into the inner ear. 
Once in the inner ear, they are converted into electrical signals the brain can easily understand and discern. 
 
        
             
        
        
        
Their purpose is reproduction.