Final answer:
Dyslexia's leading cause is related to problems with language processing, impacting reading, spelling, and sound-letter correspondence due to the brain's disordered neurological mechanisms.
Step-by-step explanation:
The question addresses the issue of dyslexia and implies that its leading cause is likely related to problems with language processing. Dyslexia is a common learning disability characterized by difficulties with reading, spelling, and sometimes numbers due to the way the brain processes language. Children and individuals with dyslexia may display behaviors such as letter reversals, word skipping, and challenges in spelling. Due to the disordered neurological mechanism for sound processing, associating sensory stimuli with learned behavior, such as sound-letter correspondence, becomes a laborious task for someone with dyslexia. The difficulties faced by dyslexic individuals can extend to other sensory perception challenges, like prosopagnosia or face blindness, as discussed in the context of ventral and dorsal visual streams in the brain.