Answer:
A
Explanation:
firstly, conservation because by planting trees, the land dat was once proned to erosion is covered thereby conserving de land and reforestation because, u hv replaced trees dat were once cut there
 
        
             
        
        
        
Your answer is <span>a. True i hope this helps you....</span>
        
             
        
        
        
Answer:
Yes. Cells have 'cell receptors' that are used to receive messengers like hormones to communicate. Cell receptors have specific shapes that fit the shape of the messenger that they want to receive. Organs like the pancreas send our these messengers to the cells to order them to do different functions.
 
        
             
        
        
        
Cancer: An abnormal growth of cells which tend to proliferate in an uncontrolled way and, in some cases, to metastasize (spread). Cancer is not one disease. It is a group of more than 100 different and distinctive diseases. Cancer can involve any tissue of the body and have many different forms in each body area.
im pretty  sure   it is the first one
 
        
                    
             
        
        
        
Answer:
causes alteration
Explanation:
when one particular species that should perform a particular function is removed it will change the ecosystem