The best option would be the letter A. They supply freshwater to support life on Earth.
Freshwater is the ultimate source of water in the terrestrial biome. It is not only important in the terrestrial biome but also in the aquatic ecosystem as it helps in transporting nutrients (ex. river is connected to the ocean).
Ecology is how nature works and flows, without it everything would be messed up, such as food chains and how people would be ranked on natures list.
D. is the answer.
Please mark as brainliest. I need it to get to Genius (rank)
