Answer - Many Types Such as 
Golgi Body
Mitochondria
Nucleus
Chloroplast 
Endoplasmic Reticulum 
Reasoning - These are specialize Organelle which function in each part of doing their duty require the layers to keep it separate in maintaining certain materials they receive within the cell.
 
        
                    
             
        
        
        
The given is incomplete as the options are missing. The correct options for the given question are as follows-
(A) cultivation of agricultural land inhibits the decomposition of organic matter
(B) nitrogen-fixing bacteria are not as plentiful in agricultural soils because of the use of pesticides
(C) land that is available for agriculture tends to be nutrient-poor
(D) the nutrients that become the biomass of plants are not cycled back to the soil on lands where they are harvested
Answer:
Option (D)
Explanation:
In order to carry out agricultural practices, the soil must be rich in essential nutrients for the growth of crops. The soil fertility is a key role in the production of crops.
This agricultural land often requires a large amount of these nutrients and minerals because some of the nutrient minerals are converted into plant biomass which is then used up to produce energy in other sectors. So, the nutrients that were present in the soil are taken away and not transferred back into the soil. This means that the nutrient cycle gets affected. Due to this reason, there requires a constant supply of nutrients into the agricultural fields.
Thus, the correct answer is option (D).
 
        
             
        
        
        
The predator is the one putting the other in danger and the prey is the one IN danger
        
             
        
        
        
Due to its short life cycle this fly can easily multiply if its population is not controlled. <span>The house fly is known to carry more than 100 diseases  including tuberculosis and cholera</span>
        
             
        
        
        
Answer:
I think its D. Artificial Selection
Explanation:
Sorry if this didn't helped you.