Correct Option: Neurological disorder characterized by trouble in forming letters and shapes.

Explanation:

Dysgraphia is a specific learning disorder and neurological condition that primarily affects writing abilities. Individuals with dysgraphia struggle with fine motor skills required for writing, leading to difficulty in forming legible letters, maintaining consistent spacing, and writing shapes or numbers correctly.

Let's analyze the given options:

1. Speech disorder characterized by stuttering and errors in articulation: This describes speech or fluency disorders like stammering or dysarthria, not dysgraphia.
2. Locomotor disorder characterized by gross motor impairment: Locomotor disorders affect larger physical movements like walking or jumping, whereas dysgraphia affects fine motor control specific to writing.
3. Neurological disorder characterized by trouble in forming letters and shapes: This is the correct definition of dysgraphia.
4. Psychological disorder characterized by lack of attention and impulsive behaviour: This describes Attention Deficit Hyperactivity Disorder (ADHD), not dysgraphia.