Concept:Afforestation is the practice that helps to restore and maintain ecosystem balance, not disrupt it.
Explanation:An ecosystem remains balanced when the interactions between living organisms and their environment are stable.
Deforestation removes trees and destroys animal habitats, which disturbs this natural balance.
Pollution introduces harmful substances into the air, water, or soil, damaging living organisms and their surroundings.
Migration can change population sizes and species interactions, sometimes shifting the ecosystem's equilibrium.
Afforestation means planting trees in areas where forests have been lost or where land is barren.
This activity prevents soil erosion, creates habitats, and improves air quality.
Thus, afforestation does not disrupt the ecosystem; instead, it supports and restores natural stability.
Answer:A. Afforestation.