4.1Root position

Take C major:

C–E–G

= до–ми–соль

The root C is on the bottom.

This is called:

root position

You can think:

1–3–5

Now take A minor:

A–C–E

also root position.

Then F:

F–A–C

Then G:

G–B–D

If you play:

C → Am → F → G → C

all in root position, your hand jumps around quite a lot.

Try it.

It works harmonically, but it is not very elegant.