Which sentence segment contains a punctuation error Alicia pay attention to her penmanship therefore writing is often difficult read?

Here's why:

* "Therefore" is an adverb that indicates consequence. It should be followed by a comma when it introduces a clause.

* "Difficult read" is an awkward phrase. It should be replaced with "difficult to read".

Corrected sentence: Alicia pays attention to her penmanship, therefore, writing is often difficult to read.