[Solved] Which nondisjunction disorder must be due to an event in sperm development? A) XO B) XXX C) XXY D) XYY E) Trisomy 21 Loneliness: A state of feeling socially isolated or disconnected from others, often accompanied by sadness or distress. Schizophrenia: A mental disorder characterized by distorted thinking, perceptions, emotions, language, self-awareness, and behavior. Communication Strategy: Planned set of actions aiming at effectively conveying information to and engaging with target audiences or individuals. Concrete Language: The use of specific, clear, and detailed language that describes exactly what is meant, typically involving physical objects or actions.