Which phrase best describes the concept of "survival of the fittest"?

The phrase "survival of the fittest" is best understood in the context of natural selection, which posits that individuals with traits or adaptations that provide a survival or reproductive advantage are more likely to pass those traits on to the next generation. Therefore, the concept is not limited to physical strength, speed, or size. Instead, it emphasizes that beneficial traits—whether they enhance foraging efficiency, disease resistance, or the ability to survive in a particular environment—increase an individual's chances of survival and reproduction. This broader interpretation allows for a variety of adaptations to be considered "fit," depending on the specific environmental pressures and challenges faced by the population. Thus, the phrasing about beneficial traits directly aligns with the fundamental principle of evolution by natural selection, making it the most accurate description of "survival of the fittest."