What is the minor key characterized by two sharps?

The minor key that is characterized by two sharps is B minor. To better understand this, it's important to know the key signatures associated with minor scales.

In B minor, the key signature includes two sharps: F# and C#. This is derived from the relative major key, which is D major, also known for having two sharps. This harmonic structure allows for a strong resolution tendency in compositions, making B minor a popular choice for various musical works.

C# minor, which has four sharps, and D minor, which has one flat, are both characterized by vastly different key signatures. E minor, on the other hand, has one sharp (F#). Thus, the presence of two sharps aligns specifically with B minor, confirming its unique position within the circle of fifths. This precise identification of key signatures is crucial for music theory and practical applications in performance and composition.