[Solved] How is an observational study different from an experimental study? Illustrate with an example. Pregnancy Rates: The frequency of pregnancies in a specified population or demographic, typically expressed per 1,000 individuals or as a percentage within a defined time frame. Prime-Time Television: Denotes the block of evening hours (typically 8 to 11 pm) considered having the largest audience and is reserved for television programs with the widest appeal. Sexual Orientation: An enduring pattern of emotional, romantic, or sexual attractions to men, women, or both sexes. Erotic Plasticity: The degree to which one's sex drive or erotic preferences may be shaped by environmental, social, or situational factors.