The best way to define military codes is : B. Secret languages used for communcuation
By using this, we minimized the risk of enemy listening to the conversation and managed to turn the condition over
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Answer:
A hormone is any chemical produced in one part of the body that has a target  Auxins promote stem elongation, inhibit growth of lateral buds (maintains Auxin is a plant hormone produced in the stem tip that promotes cell elongation. However, plants must take up various minerals through their root systems for use.
 
        
                    
             
        
        
        
Ball-and-socket joints possess a rounded, ball-like end of one bone fitting into a cuplike socket of another bone. This organization allows the greatest range of motion, as all movement types are possible in all directions. Examples of ball-and-socket joints are the shoulder and hip joints (Figure 9).
        
             
        
        
        
<span>The correct answer is common ancestry. Common ancestry is the explanation for species from completely different environments having similar features. For example: there is fossil evidence that whales are actually evolved from wolf-like animals due to fossil evidence of a transitional evolutionary stage (this is the fossil that can help provide evidence of this common ancestry) that shows a common ancestor between land mammals and whales.</span>
        
                    
             
        
        
        
Answer:
           The correct option is a.
Explanation:
                   Volcanic eruption cause the loss of flora and the soil become barren. in order to start a new form of life on this soil there is a need of primary succession. If primary succession start ans sunlight is not available too much then growth of plants may be affected. 
I hope you will understand the answer.