The appropriate name for the interval pictured is 2) Major Second.
The interval pictured is a major second. In music theory, an interval is the difference in pitch between two sounds. The major second spans two diatonic scale degrees and is characterized by a whole tone or whole step between the two notes. It is a commonly used and easily recognizable interval in various musical compositions.
The other options can be briefly explained as follows:
1. **Minor Second:** This interval spans one diatonic scale degree and is characterized by a half tone or half step. It is smaller than the major second.
2. **Diminished Second:** This term is not commonly used. The diminished second is not a standard interval in most Western music theory.
3. **Augmented Second:** This interval spans two and a half diatonic scale degrees, larger than the major second. It is not as commonly encountered as the major or minor second.
Therefore, the appropriate name for the interval pictured is:
**2) Major Second**