Final answer:
The basic four shots in bowling are: straight ball, hook ball, curve ball, and backup ball.
Step-by-step explanation:
In bowling, the basic four shots are: straight ball, hook ball, curve ball, and backup ball. The straight ball is thrown directly towards the pins, without any spin. The hook ball is released with a spin that causes it to curve towards the target at the end. The curve ball has more spin than the hook ball, resulting in a larger curve. The backup ball has spin in the opposite direction of a hook ball, causing it to curve away from the target.