By the time he was twelve years old, Mozart had compose an entire opera.
Is this correct?
Yes
It is wrong. COMPOSED
No, this statement is not correct. Wolfgang Amadeus Mozart was indeed a prodigious musical talent, but composing an entire opera by the age of twelve is an exaggerated claim. While Mozart did show exceptional talent and began composing at a young age, writing a full-scale opera, which includes multiple acts, a complex storyline, and various musical parts, would have been a remarkable feat even for someone as gifted as Mozart.
If you encounter a statement like this and want to verify its accuracy, you can use reliable sources to fact-check the information. In this case, you could consult biographies, historical accounts, or credible websites that provide accurate information about the composer's life and achievements. It is always important to verify information by consulting reliable sources before accepting it as true.