How are bass lines and riffs created in EDM?

Music

Everyone singing / playing the same pitch at the same time

Two or more pitches being played at the same time

A short repeated phrase in popular music.

A bass line using the 1st pitch from the chords

A bass line using the 3rds from the chords

A bass line using the 5ths from the chords

What would a root note bass line be in this chord sequence? Dm, Am, C, F

How can you add interest to a root note bass line?

How could you change the melodic shape of a bass line?

Which of these best describes a major triad?

Which of these best describes a minor triad?

The duration of chords within a chord progression

Which of these does NOT describe 'harmonic rhythm'?

When you rearrange the three pitches of the chord

Which of these is a C major root position triad?

Which of these is a C major 1st inversion triad?

Which of these is a C major 2nd inversion triad?