drain the water away flood the highest parts of the land leave the land alone use the land for planting crops
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: A wetland habitat can continue to support the birds and fish that live there if people ___.
Possibilities:
- drain the water away
- flood the highest parts of the land
- leave the land alone
- use the land for planting crops

leave the land alone