Answer:
G#
Step-by-step explanation:
The musical alphabet includes only 7 letters: A, B, C, D, E, F, G. On the staff, each line or space represents a different letter.
The space just above it would the “A” line (because the “G” is the final letter in the musical alphabet and after it, the alphabet simply repeats over and over again). With this in mind, the line just above the “A” space in the treble clef is named the “B” line