[Solved] What element was found to be enriched in a thin clay layer marking the Cretaceous-Tertiary boundary at several sites around the world? A)calcium B)uranium C)iridium D)niobium Cocaine: A powerful and addictive stimulant drug derived from the leaves of the coca plant, which increases levels of dopamine in the brain, leading to euphoria, increased energy, and potentially, addiction. User Expectations: The beliefs or anticipations that users have regarding the performance or behavior of a product, system, or service. Sexual Fantasies: Imaginative thoughts or daydreams about sexual activities or desires that can vary widely among individuals. Erotic Movie: A genre of film that focuses on representing human sexuality in a manner intended to provoke erotic arousal in its audience.