The given blank can be filled with Consumer.
In an ecosystem, the producers are the members, who are make their own food by using sunlight. Mainly the green plants are the producers, they produce their own food by the process of photosynthesis. 
The consumers are the organisms, who consume the food made by the producers. The source of energy for these organisms are the producers. The energy from producers is transferred to the consumers. So, energy always flows from producers to consumers. 
 
        
                    
             
        
        
        
Answer:
breathing
Explanation:
because the polluted air from factory mix into the air and then to the plants and the animals breathe the air
can i have brainlist please
 
        
                    
             
        
        
        
Answer:
Septic tanks and oxidation ponds
Explanation:
These system of wastewater treatment and disposal are not too feasible in large municipalities because of the presence of sewer system that has been made available by government, in order to mitigate the possibilities of transmitting enteric diseases that are very harmful to human health. 
 
        
             
        
        
        
<span>. Amplitude is a measure of the amount of energy in a wave. In a transverse wave, amplitude is the measure from the resting position to either the crest (high point of the wave) or to the trough (low point of the wave.)</span>