Answer: the ear drum 
cochlea
Explanation:
bc They send the sound waves to the inner ear and into the fluid-filled hearing organ (cochlea).
 
        
                    
             
        
        
        
Answer:
An earthquake
, a forest fire
, a hurricane  and a volcanic eruption.
Explanation:
An earthquake
, a forest fire
, a hurricane  and a volcanic eruption are the events that is responsible for the suitable conditions for primary succession because all the population of animals and vegetation are removed from an area and the new type of organisms is start to living in that new environment. These new organism has the ability to survive that environmental conditions. These events completely removed the population in the environment and provides conditions for primary succession.
 
        
             
        
        
        
Is this school work ? can you tell me so i can tell you professical or common 
        
             
        
        
        
Answer:
Skin = Epithelial tissue
Bark of tree = Cork
Bone = Connective tissue 
Lining of kidney tubule = Simple cuboidal epithelium
Vascular bundle = Xylem and Phloem