Answer:
Upset in a frustrated way when dealing with a ushering topic or person this could be verbal or physical people experience this emotion if many different ways hope this helped :)
Creed, credo, dogma, belief, conviction, canon, principle, notion, idea, theory, thesis.
Complex because a complex sentence has 1+ fragments of a sentence, and 1+ complete ideas
One answer would be students find it difficult to relate to poems that were written long ago, Teachers use it with other works of literature may be one, and understanding the meaning and structure of a poem is challenging.