Answer:
a. Dyslexia
Step-by-step explanation:
Dyslexia is a genetic disorder that makes learning and reading and writing difficult. The brain, for reasons not yet well understood, has difficulty linking the letters and forming the words, and does not properly relate the sounds to the syllables formed. As a symptom, the person begins to change the order of certain letters as they read and write. In summary, we can say that children with dyslexia have difficulty reading and writing because they cannot combine sounds and letters.