The triad and the seventh intervals forming the chord may be identified. In order to use this method, the structure of each of the different types of seventh chords should be shown. Seventh chords are four-note chords of which the pitch classes can be arranged as thirds is called a seventh chord.
The reason engravings are so widely dispersed is because <u>Engravings </u><u>didn’t require the </u><u>same protection</u><u> that</u><u> cave paintings</u><u> did in order to endure.</u>
<h3>Reasons Engravings were widely dispersed</h3>
- They did not need to be protected as much as paintings because they are unlikely to wash away.
- They can be made on various types of rocks and not just smooth ones.
- They are less likely to be destroyed by harsh weather and time.
As a result of this, most African art was made of engravings which were done to last as long as possible. This was then copied by several African cultures and allowed to engravings to spread.
In conclusion, option D is correct.
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