Which disease refers to the following problems? (1) A learning disorder that involves difficulty in reading due to problems identifying speech sounds. (2) It deals with how they relate to letters and words, that is, decoding. (3) It affects areas of the brain that process language.

Dyslexia is the learning disorder involving difficulty in reading due to trouble identifying speech sounds and decoding letters and words.

It arises from problems in phonological processing in the brain's language areas.

It affects decoding, that is relating sounds to letters and words, despite normal intelligence.

Alzheimer's disease is a progressive dementia of the elderly, not a reading learning disorder.

Parkinson's disease is a movement disorder, unrelated to reading difficulty.

Dyscalculia and dysgraphia are related specific learning disabilities in maths and writing respectively.