A line is an identifiable path created by a point moving in space. It is one-dimensional and can vary in width, direction, and length. Lines often define the edges of a form. Lines can be horizontal, vertical, or diagonal, straight or curved, thick or thin.
SHAPE-
A shape is when a line becomes closed, where the line forms the boundary and the space within is the shape. A shape is a two-dimensional space.
Ex: Square, circle, triangle....
ORGANIC SHAPE-
Organic shapes are figures that do not conform to specific mathematical or geometrical principles and appear natural. They have freeform and inspire feelings of calmness and naturalness.
Ex: Blob, cloud, ameba, splat.
VALUE-
Value is the lightness or darkness of a color or hue, and it's a core element that adds dimension to a piece. Artists can create value in different ways, depending on the medium they're using.
VALUE SCALE-
A value scale is organized values to show the lightness or darkness in order from white (LL) to Dark (dd). It usually consists of nine values, ranging from white to black, with shades of gray in between. The scale is often visualized as a gradient, with white at the top and black at the bottom.