Q. Which of the following are artificial ecosystems?

1. Pisciculture tank
2. Agricultural land
3. Zoo
4. Aquarium
5. National Parks

Select the correct option from the codes given below:
Answer: 1, 2, 3 & 4
Notes: Pisciculture tanks, agricultural land, zoos, and aquariums are artificial ecosystems, as they are intentionally created and managed by humans for production or recreation. National Parks are considered natural ecosystems, as they preserve native biodiversity and ecological processes, despite some human management. Thus, only options 1, 2, 3 & 4 are artificial ecosystems.