In the classical multimovement cycle, which movement is most commonly in a contrasting key from the other three?

Which of the following ensembles could play basso continuo? a. organ and violin b. organ and cello c. bassoon and timpani d. harpsichord and flute

In the artwork "that gentleman" by andrew wyeth how intense are the colors? what are their individual values and temperature?

What does bts stand for? what is the importance of bts? who first started it?