BiosphereInteraction between organisms and their environment, which includes both biotic and abiotic factors. CommunityAll organisms in a particular area. PopulationAll individuals of a particular species in a particular area. OrganismAn individual. Organ systemA group of organs that work together to perform a certain task. OrganTissues that work in unison to carry out a specific set of functions. TissueA group of cells with the same structure and function. CellThe basic biological unit of life in all organisms. The smallest autonomous self-replicating unit. OrganelleAn organized differentiated structure with a cell that performs a specific function. MoleculeTwo or more atoms combined.
Explanation : Water Vapor is a source of warmth, since the heat that is radiated from Earth is absorbed by the water vapor. This is why greenhouses use water vapor as well.