This one: "Lee noticed a problem and alerts a teacher".
The second verb should not have been changed to present tense.
You should change the verb alert to past tense: "Lee noticed a problem and alerted a teacher".
<span>The scar is the place where the plane ripped across the island as it was crashing. Symbolically, it represents the injuries he island suffered as a result of humans.</span>
One out of four types of character belongs to round character. It has characteristics that able the readers to get-to-know the character. They have the ability to change according to their motivation and inspiration to further understand the story.
