Find the main idea. A useful summary distills the source material down to its most important point to inform the reader. ...
Keep it brief. A summary is not a rewrite—it's a short summation of the original piece
Write without judgment
Make sure it flows
Answer:
A star's gases' can burn for a long time
Explanation:
The word marked in bold in the sentence above is the word that has an error. The correct thing would be to write the word "gases" without using the apostrophe (') after the last "S", since the apostrophe is used to cause the impression of possession and it has already been used, correctly in the word "Star's".