A large flowerbed is designed to attract pollinators such as bees,butterflies,and hummingbirds.It contains a variety of plants of different heights-shrubs,forbs,and annuals-with flowers that bloom at different seasons.The pollinators are most likely attracted to the flowerbed because of its complex
A) species turnover. B) habitat structure. C) successional changes. D) ecological transitions. E) environmental gradient.