Equilibrium is achieved when the reaction rate of the forward and backward reaction are equal or the concentrations of the reactants and the products are in an unchanging ratio. Specifically, this system is in a dynamic equilibrium.
        
             
        
        
        
Answer:
5) Plant; 6) Heat; 7) never heard of chemosynthesis, sorry :(
Explanation:
A plant is the only thing in an ecosystem that uses photosyenthesis. This includes trees, algea, and grass. 
80% of energy is lost as heat used in order to keep the animal warm.
 I am really sorry I couldn’t help with 7!
 
        
             
        
        
        
Answer:
radiation, conduction, convection, conduction
 
        
                    
             
        
        
        
I think it’s number 5 and number 9 hopes this helps.