Answer:
The answeer is both B and D.
Its role is to break down rotting carcasses and dead plants.
During the Light dependent reaction of photosynthesis light energy is converted into chemical energy
Answer:

Your bronchioles are some of the smallest airways in your lungs. Inhaled air passes through tiny ducts from the bronchioles into elastic air sacs (alveoli). The alveoli are surrounded by the alveolar-capillary membrane, which normally prevents liquid in the capillaries from entering the air sacs.
Answer: Giant pandas have been allowed to persist only at elevations higher than land that can be used for productive agriculture. However, as the agricultural value of land in current panda habitat increases under a changing climate, activities like growing crops and grazing livestock may further encroach on their habitat.
Explanation: