Convergent evolution would be the best way to explain why two species that look similar are not necessarily that closely related. In convergent evolution, distinct species develop similar anatomical characteristics after its divergence from one common ancestor that does not possess the initial characteristic. 
        
             
        
        
        
Hey there, whats up
the answer is: <span>they trap heat in the atmosphere, warming the planet
hope it helps ;) good luck</span>
        
                    
             
        
        
        
Lichens are the photosynthetic organisms.