In music theory, scale degree refers to the position of a particular note on a scale relative to the tonic, the first and main note of the scale from which each octave is assumed to begin. Degrees are useful for indicating the size of intervals and chords, and whether they are major or minor.

Answer this question based on the passage: what is the name given to the first scale degree? Okie... think carefully first, then make a decision:
The important part for answering this question is: In music theory, scale degree refers to the position of a particular note on a scale relative to the tonic, the first and main note of the scale from which each octave is assumed to begin. So, the answer is the tonic.