There is no picture attached to this questions so i’m not sure what you’re going off but the dependent variable is a variable whose depends on a another variable while a independent doesn’t rely on anything
Green plants remove carbon dioxide from the atmosphere by photosynthesis.
Different life forms adapt to their environment. Stable ecosystem creates a stable environment for life forms. In stable environment, life forms do not have to adapt all the time and their energy can be invested into other life processes, such as growth, reproduction, etc. Stability of ecosystem is important for adjoining ecosystems because that way boundaries and influences could be extended. Stable ecosystems are able to interact and both benefit from each other.
The answer would be B.Monomers contains double bonds.