If you put the fruit on the ground, many ants will crawl on the fruit. What happened?

Because fruit contains sugar and is sweet, ants like to go where there is sugar. Besides, honey can also provoke ants. Have you ever heard of an allusion: During the Warring States Period, Liu Gang chased Xiang Yu, and Xiang Yu fled to the Wujiang River, and saw many ants forming a "overlord, committing suicide on the Wujiang River-". At that time, Xiang Yu thought it was providence, so he drew his sword and committed suicide. In fact, this is a trap set by Liu Bang. Why do so many ants form those big characters? That is to say, Liu listened to the strategist's plan, wrote words on the stone with bees, and used the ant's habit of eating sugar to kill Xiang Yu.