Which instruments should be used to make a pitch correction when you have deviated from your assigned altitude?

During standard-rate turns, which instrument is considered “primary” for bank?

The primary reason the pitch attitude must be increased, to maintain a constant altitude during a coordinated turn, is because the

En route at FL 290, your altimeter is set correctly, but you fail to reset it to the local altimeter setting of 30.26” Hg during descent. If the field elevation is 134 feet and your altimeter is functioning properly, what will it indicate after landing?

What does the miniature aircraft of the turn coordinator directly display?