Effects can have multiple causes and vice versa. Like how the Revolutionary war started from many acts and actions by the British. Also for a cause could have multiple effects, an example also takes us to the Revolutionary War, when the patriots declared independence they started a war which lead again to many gory battles. Other examples are when the tea act was passed it caused the patriots to rally and start the Boston Tea Party, which in turn hurt British exports of tea. These are few of the many examples that happened in the Revolutionary War.