Question

which as not a natural
ecosysten​

Answer 1

Answer:

Aquarium is not a natural ecosystem. An aquarium is a man-made ecosystem which is designed for faunal life mainly including fishes, snails, or other aquatic animals along with aquatic plants. An aquarium is used as a showpiece in house, mall, restaurant and etc.

Answer 2

Artificial ecosystem is an ec osystem which is maintained by human while the natural ecosystem grows without any human interference ..

For ex: Garden is artificial ecosystem while ponds lakes are natural ones