releasing nitrogen in the soil. crowding out non-native species. adding carbon dioxide to the atmosphere. removing water from the soil and returning it to the atmosphere.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Trees most likely change the environment in which they are located by
Possibilities:
- releasing nitrogen in the soil.
- crowding out non-native species.
- adding carbon dioxide to the atmosphere.
- removing water from the soil and returning it to the atmosphere.

removing water from the soil and returning it to the atmosphere.