Which learning disability can interfere with writing and also affect speaking?

The correct choice is dysgraphia, as this learning disability specifically impairs an individual's ability to write effectively. Children with dysgraphia often struggle with the physical act of writing, including holding a pencil, forming letters, and organizing their thoughts on paper. This can lead to difficulties in both handwriting and written expression. Additionally, dysgraphia can also affect motor skills, which can have an indirect impact on speaking, particularly in terms of organizing and articulating thoughts in a coherent manner.

Dyslexia primarily affects reading skills, involving difficulties in decoding words, reading fluency, and comprehension, without necessarily impacting writing or speaking abilities in the same way. Dyscalculia involves challenges with number concepts and mathematical skills rather than language or writing. Central auditory processing disorder is focused on how the brain processes auditory information, which can affect listening and understanding spoken language but does not directly relate to writing skills. Thus, dysgraphia is the most relevant answer when considering both writing and potential impacts on speaking.