A and D should both be correct, this is not the best made question.
Answer:
A wetland is a distinct ecosystem that is flooded by water, either permanently or seasonally, where oxygen-free processes prevail.[1] The primary factor that distinguishes wetlands from other land forms or water bodies is the characteristic vegetation of aquatic plants,[2][3] adapted to the unique hydric soil
Answer:
idk if I'm right but I think shape
Explanation:
because it's hard to tell what the shape is