Question 1343Navigation General

The correct answer is D) the ratio of the actual vapor content at the current temperature to the air's vapor holding capability. Relative humidity is defined as the ratio of the actual vapor content in the air to the maximum vapor content the air is capable of holding at a given temperature. This ratio is expressed as a percentage, and it represents the saturation level of the air. Answer D accurately captures this definition, while the other options do not fully describe relative humidity. Option A is incorrect as it does not mention the air's vapor holding capability. Option B is incorrect as it refers to the maximum vapor content, not the ratio to the actual vapor content. Option C is incorrect as it refers to the minimum vapor content, which is not how relative humidity is defined.