Construction is the process of creating the foundation and structural components of a building. This involves activities such as laying the foundation, building walls, and constructing the roof. It is planned and executed by civil engineers and architects.
Decoration is the art of enhancing the aesthetics of the interior and exterior of a completed structure. It encompasses elements like painting, furniture selection, and accessory usage. Interior designers and decorators are responsible for this aspect.
Style is the overall concept that emerges from the combination of elements used in decoration, reflecting the individual's taste and personality. It varies based on personal preferences, lifestyle, and cultural influences.