Task Partitioning
Different species of insects have different ways of organizing the essential tasks that need to be completed in order for them to survive. One way of accomplishing this process is through task partitioning. Insect groups that use this method divide, or partition, their work into several different stages that are ordered and performed in a fixed sequence by different groups of workers. An important benefit of this technique is increased efficiency, since the workers performing each task are specialized which saves time and energy.
听力材料：
Narrator: Now listen to part of a lecture, in a biology class.
Lecturer: Okay, now a good example of this, is leaf cutter ants. They use this kind of system when they need to get food. Leaves to their nest. What happens is, that they’re separated into three different groups. And each group has a different part in the process, of transporting food back to the nest. So, the first group. Their job is to climb up a tree and start cutting off pieces of leaves. But instead of carrying the leaf pieces back down the tree - the ants just let go of the pieces so they fall down to the ground below. And after a while, all these leaf pieces collect in a pile at the bottom of the tree. Then, there is a second group of ants waiting to help. This second group’s job is to cut the leaves down into smaller more manageable pieces that are easier for them to carry. Then, they take these smaller pieces of leaves to a place that’s part-way back to the nest. Finally, the last group of ants take over. And they have the job of actually bringing the leaf pieces back from the trail to the nest. The system works well, since each ant has a specific job to do, work gets done faster than if they were all working independently. And since, none of the ants have to keep climbing up and down the tree, they can all do their jobs without piling up too soon.
Question：
Explain how the example of leaf cutter ants, illustrates the concept of task partitioning.
