Explanation:
Invading infectious diseases can, in theory, lead to the extinction of host populations, particularly if reservoir species are present or if disease transmission is frequency-dependent.
 
        
                    
             
        
        
        
It is muscle and nerve tissue
        
             
        
        
        
Answer:
The right answer is D. The benthic zone
Explanation:
The limnetic and the littoral zone  all get a lot of sunlight so there are a lot of plant life. The pelagic zone hosts a variety of plant species so this cannot be the correct answer. That leaves us with the benthic zone.
Benthic meaning inhabiting bottom areas or substrates. Plant life at the bottom is very scarce but there are a lot of insect species. 
 
        
             
        
        
        
B, because as energy is move up form the phyramid, energy is lost.
 
        
                    
             
        
        
        
It is false that constellations are only visible in certain seasons due to the revolution of the Earth toward the constellation.