Question

the purpose of the ecocolumn is to demonstrate that whatever is added to the land, eventually impacts which of these? the light source the lower water layer the plastic bottle the color of the bottle

Explanation:

In an ecocolumn, substances added to the land - based part can leach and move through the system, eventually impacting the water layers below due to the interconnected nature of the ecological components. The light source is external and not directly affected by what is added to the land. The plastic bottle and its color are just containers and physical characteristics that are not directly impacted by substances added to the land in the context of ecological processes.

Answer:

the lower water layer