Question 958Navigation General

The correct answer is B) barometric pressure. Isobars are lines on a weather map that connect points of equal barometric pressure. The numbers on isobars indicate the specific barometric pressure value at that location, typically measured in millibars (mb) or hectopascals (hPa). This allows meteorologists and mariners to visualize the atmospheric pressure patterns and how they change over time, which is crucial for understanding and predicting weather conditions. The other options are incorrect because isobars do not directly represent wind speed (A), temperature (C), or rainfall (D). Those weather variables are represented by different symbols and contours on a weather map.