the correct answer is isobar.
isobars are lines that connect points of equal atmospheric pressure on weathers maps. they are drawn in such a way that they never cross each other. they are used by meteorologists to depict atmospheric pressure changes over a particular area and to make predictions about the wind flow ( changing directions of wind).
the isobars are generated from mean sea level pressure reports and the pressure values are given in millibars.
i can you with this but i need to see the answers to chose from