What does it mean to “share a border”?

Initially what happened to marigold litton after each test session

On a supply and demand graph, equilibrium is the point where the two curves meet. the supply curve begins. the supply curve ends. the demand curve ends.

Helen is looking at a picture in which some of the border is missing. however, she is still able to understand the object is a picture of an american flag due to the perceptual principle of