Answer:
d. reduce heat gain during summer months
Step-by-step explanation:
Deciduous plants (trees, shrubs, and herbaceous perennials) are those plants that lose all of their leaves for a certain part of the year.
Such types of plants are found in areas where there are cool winters and warm moist summers.
Deciduous vegetation can play a large role in building design as a result of its ability to reduce heat gain during the summer months.
Option d. is correct.