If you could, please add an explanation just for clarification!
I really appreciate it, Thank you!
The correct answer is oxymoron.
Oxymoron is a type of figurative language used when trying to illustrate a rhetoric point.
Here, it is obvious that Queen Elizabeth had a purpose for saying this quote.
What she did not do was compare two objects (simile or metaphor), give inanimate objects human qualities (personification), use words of noises (onomatopoeia), or use words that start with the same letters (alliteration.)
Therefore, t he correct answer is oxymoron.
Hope this helps! :D