The lines making a circle are shown in the image attached below. Kindly open the image for better understanding.
Option C is the indication of low pressure.
What does the low-pressure area indicate?
Equal pressure is represented as a line that forms a circle. The pressure ratio in that location is indicated by the circles. When you see an "L" surrounded by circles, the circles indicate that the pressure increases as you move further away from the "L."
Learn more about low-pressure, refer below
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