What describes a ecosystem​

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An ecosystem is a geographic area where plants, animals, and other organisms, as well as weather and landscape, work together to form a bubble of life. Ecosystems contain biotic or living, parts, as well as abiotic factors, or nonliving parts. ... Ecosystems can be very large or very small.

An ecosystem is a set of plants and other living organisms ( biocenosis) that are interrelated and that share the same environment with certain physical and chemical characteristics ( biotope). One ecosystem differs from another because of its biodiversity, its climate, and its geography.

i think that d. wind is the answer.   i missed the question when i answered a. currents.