Question: Choose the statement that best defines the Palmer Drought Severity Index. Need Assignment Help? Multiple Choice A quantitative index of drought in a region that uses temperature to calculate moisture conditions relative to long-term averages. A quantitative index of drought in a region that uses temperature and precipitation to calculate moisture conditions relative to long-term averages. A qualitative index of drought in a region that uses field measurements of soil conditions to calculate moisture conditions relative to long-term average The mean annual precipitation divided by the mean annual high temperature of a given region.