Which would be considered an ecosystem? A
a colony of bacteria
B
biotic factors in a forest
с
populations of zebras and lions
D
living and nonliving things in a pond

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. Biotic factors include plants, animals, and other organisms

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A colony of ants is a species,  C is only animals and only the biotic factors it is D living and nonliving things in a pond

Explanation:

Explanation:

sun.

methane,

Neptune

terrestrial