Here are the correct order of the words for each sentence:
"What does your grandmother look like?"
This sentence is a question asking about the appearance of someone's grandmother.
"Her friend is tall and pretty."
This sentence describes a friend who is both tall and pretty.
"Linh is shorter than Mai."
This sentence compares the height of Linh and Mai, indicating that Linh is not as tall as Mai.
To organize the words correctly, you need to follow the standard sentence structure, which usually involves a subject followed by a verb and complement or predicate.