Match the items. The task is to match the lettered items with the correct numbered items. Appearing below is a list of lettered items. Following that is a list of numbered items. Each numbered item is followed by a drop-down. Select the letter in the drop down that best matches the numbered item with the lettered alternatives. a. Is the rate at which wind velocity changes from point to point in a given direction. b. When the speed changes between the two points, but not direction. c. When the direction changes between the two points, but not speed. d. When the downdrafts overtake the updrafts. e. When the an air parcel is forced to rise, cool, and condense. f. When precipitation begins to fall from the cloud.