Final answer:
A left parietal lesion can impair handwriting, while a right parietal lesion can reduce the ability to copy shapes.
Step-by-step explanation:
A left parietal lesion can result in impaired handwriting. The parietal lobe plays a crucial role in motor control, and damage to the left parietal lobe can affect the fine motor skills required for writing.
A right parietal lesion can result in reduced ability to copy shapes. The right parietal lobe is involved in visuospatial processing, and damage to this region can impact the ability to accurately perceive and reproduce shapes.