Answer:
The term expectations is simply economist jargon for forecasts. For every action, a person relies on his or her forecasts of the future; that's the whole point of acting, to try to influence future events. The text dealt with an example of Crusoe building a raft, only to realize he couldn't get out to the open sea. But even more mundane actions rely on expectations. For example, Crusoe "expects" that if he climbs a tree, he will be able to knock coconuts down, and that the coconuts will not be full of spiders when he cracks them open.