Final answer:
Repetition is the technique that specifically targets automaticity as a fluency subskill. It helps to perform tasks automatically with practice, making it easier to recall with little effort.
Step-by-step explanation:
Among the provided techniques, repetition specifically targets automaticity as a fluency subskill. Automaticity refers to the ability to perform tasks without occupying the mind with the low-level details required, allowing it to become an automatic response pattern or habit. This is often the result of learning, repetition, and practice. For example, the way many children learn their ABCs by singing the alphabet song involves continuous repetition until the task is done almost unconsciously.
While chunking organizes information into manageable bits, visualization aids in encoding information by creating mental images, and elaboration connects new information to what is already known, none of these techniques target automaticity as directly as repetition does. The repetitive practice of information ultimately becomes automatic and can be recalled with little to no effort.