<u>Answer:</u>
Photosynthesis and respiration are so interrelated with each other that one’s product are used as another’s reactant. 
<u>Explanation:</u>
- Photosynthesis is a process used by organisms to convert 'light energy' into 'chemical energy', which is used as a source of energy for the organism. 
- Respiration is a process in which glucose and oxygen is used to create ATP for the survival of the organism. 
- During photosynthesis 'water and carbon dioxide' reacts in presence of light to create oxygen and glucose. 
- Without photosynthesis and respiration life ceases to exist on earth.
 
        
             
        
        
        
The part of the brain that distinguishes the human qualities that we have over animals is the frontal lobe. <span>It </span><span>is the part of the brain that controls important cognitive skills in humans, such as emotional expression, problem solving, memory, language, judgment, and sexual behavior. It is, in essence, the “control panel” of our personality and our ability to communicate.</span>
        
                    
             
        
        
        
True vocal cords is the answer <span>ʕ•ᴥ•ʔ</span>
        
             
        
        
        
Ecosystem is a community or group of living organisms that live in and interact with each other in a specific environment.
An ecosystem is a community of living organisms in conjunction with the nonliving components of their environment, interacting as a system. These biotic and abiotic components are linked together through nutrient cycles and energy flows.