A line on a map joining places of equal monthly or yearly rainfall is called

Option: B
Explanation : Isobar:- is a line on a map connecting points having the same atmospheric pressure at a given time or on average over a given period.
Isoneph:- is line on a map connecting points that have the same average percentage of cloudiness
Isohyet:- is a line drawn on a map connecting points having equal rainfall at a certain time or for a stated period.
Isotherm:- a line on a map or chart of the earth’s surface connecting points having the same temperature at a given time or the same mean temperature for a given period.

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