What is dyslexia primarily characterized by?

Dyslexia is primarily characterized by difficulties in processing language symbols and reading. This condition affects an individual's ability to decode letters and words, which significantly impacts their reading skills. People with dyslexia may have trouble recognizing words, which can lead to challenges in reading fluency and comprehension. While they may have normal intellect and vision, the specific difficulty lies in the way their brains process language, leading to challenges particularly associated with reading and writing tasks. This option directly aligns with the core features of dyslexia, making it the most appropriate answer.

Other choices refer to different learning disabilities or challenges that might not specifically relate to the defining characteristics of dyslexia. For example, difficulties with mathematical concepts might be indicative of a different learning disability, and composing written language pertains more to issues related to writing disorders. Inability to recognize spoken words is more relevant to auditory processing disorders rather than dyslexia itself.