[Solved] Most interstellar matter is too cold to be observed optically.Its radiation can be detected in which part of the electromagnetic spectrum? A) gamma-ray B) ultraviolet C) infrared D) X-ray Father's Absence: The lack of a father figure in an individual's life, which can impact various aspects of development and psychological health. Sexual Activity: Behaviors related to seeking or experiencing sexual pleasure, including intercourse and other acts. Erotic Plasticity: The degree to which one's sex drive or sexual interests can be shaped by cultural, social, or situational factors. Depression And Anxiety: Common mental health disorders characterized by persistent sadness, worry, and fear, affecting daily functioning.