Mario is learning communication skills through the use of amplified sound and residual hearing in order to him develop oral language skills. this is an example of the approach to teaching communication skills.

The answer to the blank part of the statement is auditory. By relying on his residual hearing skills to develop oral language skills, Mario is using an auditory approach in language learning, even though he is hearing-impaired.

This differs from the oral approach, which teaches communication skills by combining sounds that are amplified and kinesthetic speech training.

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