Angiosperms
Step-by-step explanation:
The garden designer chose to work with Angiosperms rather than gymnosperms because:
a. Angiosperms can produce flowers and fruits to aid in seed dispersal
Angiosperms are the only flowering plants. They are considered to be the most evolved groups of plants, because they produce flowers and seeds enclosed in the fruits. Flowers are considered an advance character because they aid in pollination. seeds enclosed within an fruit is another advance character because the seeds can be protected and dispersed to long distances till they get suitable conditions for germination.