1. Camouflage 
2. Competition 
3. Competition 
4. Symbiosis 
<h3><u>Explanation</u>:</h3>
The camouflage is defined as the property of the living organisms that make them to prepare their body to perfectly match with their surroundings so that they cannot be recognised by their hunters. This makes them survive more in an environment with full of competition. 
The competition is an interaction between the organisms where in a particular environment, different organisms compete for a particular prey for their living. Here the theory of the survival of the fittest work. 
The symbiosis is an interaction between two or more species which leads to benifit of both the species in their living. Here one species help other in a form and other species do the same. There's benifit for both in the interaction. 
 
        
             
        
        
        
I believe It’s A I’m sorry if I was wrong
        
                    
             
        
        
        
The blood glucose level is 7.45.
        
             
        
        
        
The correct answer is a structure that would differentiate the hollow heart into chambers to separate oxygenated blood. 
The heart has four chambers: two ventricles and two atria. The right atrium gets oxygen-poor blood from the body and pumps it to the right ventricle. The right ventricle pumps the oxygen-deficient blood to the lungs.
The left atrium gets oxygen-enriched blood from the lungs and pumps it to the left ventricle, and the left ventricle pumps the oxygen-enriched blood to the body. The right and left atrium are distinguished by a wall of tissue known as the atrial septum, and the left and right ventricles are separated by the ventricular septum.