Answer:
Bone marrow. 
Explanation:
Hematopiesis may be defined as the formation of the blood cells by the precursor stem cells. This process occurs in the bone marrow, thymus and liver.
The red blood cells are enucleated cells with the minimum span of around 120 days. These cells are processed and destroyed in the spleen. The iron is recovered from the red blood cells and sent again into the bone marrow for the production of new blood cells.
Thus, the answer is bone marrow.
 
        
             
        
        
        
The correct answer is C) Wood burning. Hope this helps.
        
                    
             
        
        
        
I don’t understand what u say
        
             
        
        
        
Hollow bones are always a disadvantage because it means that they are less sturdy and easier for predators to break.
        
                    
             
        
        
        
The Answer is (A) 
Because the pesticide will kill off the bugs and weeds but will damage the soil so after the crops you have in the ground now just will not grow there again until 1 year after the pesticide has washed away
hope I helped