Enzymes lower the activation energy of a chemical reaction. 
        
                    
             
        
        
        
Because the environment is faster then the squrrel has to find stuff for the nest and a safe spot
        
                    
             
        
        
        
Answer:
plant cell 
Explanation:
1.cell well-protected and provides structural support of cell
2.cell membrane regulates entries and entries of substances within the cell.
3.nucleus stores DNA 
4.plastids they store starch help in photosynthesis 
5.chloroplast pigment which protect cell
6.vacuole sustain turgid pressure against cell wall
7.mitochrondria provide energy to help break carbs
8.lysosome help with cellular waste disposal
 
        
             
        
        
        
Assuming a 10% trophic efficiency, the herbivore (primary consumer) will get 10% of the producer energy. Then, the second consumer that eat the herbivore will get 10% of the primary consumer energy, so it is 10%*10%= 1% of the primary producers. 
Then, the t<span>ertiary consumer should get 0.1% of the primary producers' energy.</span>