Answer:
a misplaced modifier.
Explanation:
Misplaced modifiers are words, phrases, clauses that are incorrectly placed in a sentence. When such modifiers are placed that way, it makes one reading the sentence to find it difficult to easily understand. So, it's better the sentences with misplaced modifiers are corrected for better understanding.
Therefore, in sentence 8, "in the morning" acts as a misplaced modifier.
