Answer:
Ral's memory of how to avoid slicing the ball is probably 3. a procedural memory.
Explanation:
Procedural memory is in charge of remembering motor skills, it is the storage of procedures, as the name states.
It is part of the long-term memory and it becomes automatic because once an individual learns how to carry out an action, he/she does not have to think about how to do it again and simply does it.
This explains why Ral cannot describe how he avoids slicing the ball; this information is stored in the procedural memory and is therefore automatic. He doesn't have to think about how to do it anymore.