To solve this problem, we need to understand the concept of evolutionary patterns. Let's analyze the given options:$\newline \bullet$Convergent evolution:$\newline$ - This occurs when different species evolve similar traits independently, often because they adapt to similar environments or ecological niches.$\newline$ - The flippers of penguins and dolphins are an example of convergent evolution because both have adapted to swimming in water, despite belonging to different groups (birds and mammals, respectively).$\newline \bullet$Divergent evolution:$\newline$ - This occurs when two or more related species become more dissimilar over time, often due to different environmental pressures.$\newline$ - This is not applicable to the flippers of penguins and dolphins, as they are not closely related species.$\newline \bullet$Adaptive radiation:$\newline$ - This is the process by which a single ancestral species rapidly diversifies into a wide variety of forms to adapt to different environments.$\newline$ - This does not describe the relationship between penguins and dolphins.$\newline \bullet$Natural selection:$\newline$ - This is the process by which organisms better adapted to their environment tend to survive and produce more offspring.$\newline$ - While natural selection is a mechanism of evolution, it does not specifically describe the relationship between the flippers of penguins and dolphins.$\newline$Therefore, the correct answer is Option 1: Convergent evolution.