The term 'Subjects of Essays' can refer to any topic that is discussed in an essay. This could include topics such as history, literature, philosophy, science, and more. The crossword solution for this term is ORES, which stands for 'Organic Resources and Energy Systems'. This term is used to describe the study of natural resources and energy systems, such as renewable energy sources, fossil fuels, and other forms of energy production. It also includes the study of how these resources are managed and used in order to create a sustainable future.