Answer: The artist who works with the principles of good composition will create a more interesting piece; it will be arranged to show a pleasing rhythm and movement. A good knowledge of composition is essential in producing good artwork. Understanding the visual elements of art is of key importance to see like an artist. Rather than looking at an object as what it represents, you will learn to see that object as an arrangement of different visual elements (shapes, textures, colors, lines, etc). This may influence your art, usually not for the better.
Explanation:
3. Dynamics indicates the loudness or softness of music.
4. A decrescendo is used to indicate that the music should gradually become softer.
12. The dot after a note increases its value by half of its original value
13. Allegro is a commonly used tempo marking, indicating to move at a brisk tempo.
Sorry I don't know all of the answers, hope this helps!