What does the lines making a circle around the high-pressure area indicate? a. an occluded front b. areas of equal altitude c. areas of equal pressure d. a stationary front

The lines making a circle around the high-pressure area indicate areas of

equal pressure.

Lines which have equal pressure in the system are referred to as Isobars.

Isobars are used in determining areas which have high or less pressure for

weather forecast etc.

The lines in the high pressure area helps to determine the strength of a

system in a pressure field.

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The answer is; C

These lines that join areas of equal pressure during an air system are called isobars. The black lines in the diagram below are the isobars. They are good indicators of the strength of these systems. The innermost closed lines indicate the positions of relative maxima (high-pressure areas) and minima (low-pressure areas) in the pressure field.