Definition of following

Dear student you are supposed to ask single query in  a thread,here i will write definitions of only few words asked above.
Iron :It is an element with symbol Fe  and atomic number 26 .It is present in various ores like haematite, magnetite, and siderite .
Irrigation :It is a process or a  system of watering lands by the means of artificial canals or ditches, etc.It is meant to increase the production of crops.
Village is defined a 
group of houses and also the associated buildings, larger than a hamlet but smaller than a town, situated in a rural area .
 

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A definition of iron...

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