Superultra microscopic silicon volcaniconios ​

Pneumono refers to the lung. Ultra means extremely, microscopic means tiny, silica is sand, volcano is self-evident, and coniosis is scarring. Put them all together and you have what the OED recognizes as the longest word in the English language,

Explanation:

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it is the nurture that decides the behavior of a child.

explanation:

naturally, children are pure. it is an environment and the type of attention a child gets that determines their behavior.