When New Orleans was drained of water and levees were built to keep new water from coming in, what happened to the elevation of New Orleans over time?

Nothing really but the elevation went up when the water was drained.

Explanation:

lee and grant, both of whom held the highest rank in their respective armies, had known each other slightly during the mexican-american war (1846-48) and began their dialogue by exchanging awkward personal inquiries. characteristically, grant had arrived in his mud-splattered field uniform while lee had turned out in full dress attire, complete with sash and sword.

explanation:

the answer is actually b.   as habitats are destroyed, animals and plants may become extinct.   , according to edge nuity