When Stars Are Scattered Practice Test

This question hinges on recognizing a hyperbolic way to express almost no chance. Saying something is “as likely as a grain of sand” uses the idea that while there are countless grains of sand, the probability of any one specific grain ending up in America is vanishingly small. Other options like a cloud, a snowflake, or a leaf can plausibly travel long distances through natural processes, so they’re not as extreme in implying improbability. So the grain of sand best conveys an almost impossible odds, which is why it’s the right fit.