<human>:  How can I tell if a watermelon is ripe?
<bot>: The best way to tell if a watermelon is ripe is to look for a few key signs. First, the watermelon should have a smooth, symmetrical shape. Second, if you gently thump the watermelon, it should sound hollow. Third, the watermelon should have a yellow spot on one side, indicating that the melon has been sitting in the sun for a few days and is ripe. Finally, you can also check to feel if the watermelon is heavier than usual compared to other watermelons in the same size range. By following these tips, you can easily determine if your watermelon is ripe and ready to be enjoyed!