To complete this lesson, complete the following tasks:
- Watch the lesson video.
- Study the lesson for mastery.
- Complete the lesson assessment.
A Dog, bearing in his mouth a piece of meat that he had stolen, was crossing a smooth stream by means of a plank. Looking in, he saw what he took to be another dog carrying another piece of meat. Snapping greedily to get this as well, he let go the meat that he had, and lost it in the stream.