Answer:
The tonic chord is a chord built on the first scale degree of a major or minor key. It is also known as the I chord or the "home" chord because it is the starting and ending point of the key signature. The chord made of C, E, and G is the C major chord and is an example of a tonic chord.
Therefore, the correct answer is option C, "chord made of C, E, and G."
Step-by-step explanation: