Answer:
the third one is correct 
explanation 
because atomic number and proton &electron number is same . neutron number is solved as atomic mass minus atomic number ( N=atomic mass - atomic number)
 
        
             
        
        
        
Cons:
It kills animals 
It destroys land and trees
It ruins animals homes 
Pros 
It clears up lane so we can build 
Some rare animals need fire to reduce overhanging plants to live ( it’s called a karner blue Caterpillar btw) 
And fire is a natural phenomenon that nature has evolved with
        
             
        
        
        
Answer:
Modern method of irrigation is Sprinkling, Subirrigation,intrasoil and salt leaching are the principal purposes of surface irrigation 
 
        
             
        
        
        
Answer:
The most common nutrients causing eutrophication are nitrogen and phosphorus. The main source of nitrogen pollutants is run-off from agricultural land, whereas most phosphorus pollution comes from households and industry, including phosphorus-based detergents.
Explanation:
 
        
             
        
        
        
Answer: D
Explanation: I Googled it