If a single sharp is in the key signature of the Bass clef, where is do?

This is called adduction

Answernon-religious themes became more popular, and people also wanted to show off their wealth because painting was a sign of this at the time;

Answerrelics;

For example you could start a retail clothing store because you would need to have skills in business and you could start an photography business you would need to have skills in photography. hope this