What means d in the <path> drawing? And how can I draw the elliptic figures in path?

Answer 1

d = "path data"

*example code to create elliptic figures using <path>*
<svg height="400" width="450">
<path d="M 100 350 q 150 -300 300 0" stroke="red"
stroke-width="5" fill="none" />
</svg>

Yes, it's complex. Because of the complexity involved in drawing paths, it is highly recommended to use an SVG editor to create complex graphics.