[Solved] External auditors are usually employees of the company. Ultraviolet Radiation: A form of energy emitted by the sun, invisible to the naked eye, which can have harmful effects on human skin and eyes but is essential for the synthesis of vitamin D. Earth: The third planet from the Sun, characterized by its vast oceans, diverse ecosystems, and the presence of life, including human civilization. Fish Species: Various types of fish differentiated by genetic, morphological, and ecological characteristics, comprising a significant portion of aquatic biodiversity. Decline: A gradual decrease in quality, quantity, or significance of something, such as economic performance, population numbers, or social values.