Concept:The phrase "in leaps and bounds" is an idiom that means very fast and significant growth or progress.Explanation:When herbs grow "in leaps and bounds," they do not grow slowly or in small numbers.The words "leaps" and "bounds" suggest large, forceful forward movements.So the growth is rapid, swift, and on a large scale.It has nothing to do with circular heaps or specific weather conditions.Thus, the herbs grow quickly and greatly.Answer:D. quickly and greatly.