Nutsbolts 982 . It is considered to be so because it is the one component of music that is felt instead of heard. A melody is simply a line of single notes, sung or played one at a time, and selected and strung together in a way that generates a feeling of purpose and destination.
All melodies share certain fundamental characteristics.
Range means the distance in pitch between the highest and lowest notes , or, in other words, how wide a portion of the scale it covers. Our National Anthem is both a great tune and an inspiring poem, no doubt about it, but it's not very comfortable for the average patriot to sing. Now, America is an example of a very smooth melody. But there was a time when melody stood alone, unsupported by chords or by a regular beat. Such places in music are called cadences.