“A compositional guideline in art and photography that suggests dividing an image into nine equal parts by two equally spaced horizontal lines and two equally spaced vertical lines.”
This is a photo of a flower. It is the rule of thirds because it lands on the lines of the grid.
Another flower, and it is the rule of thirds, because the main focus is on the grid lines.
This is the rule of thirds because the tree trunks line up on the grid line.
This is the rule of thirds because there is one point of focus, and it’s in a box of the grid.
This has the main attraction near the viewer, and there is a leading line in the background.
The main thing is the thing the camera is focused on.
The main focus of the photo is in a box on the grid line.
The moon is in one of the third squares.
The two tallest flowers landed on the line of thirds.
The middle of the flower falls on where the grid line meets.
The middle of the flower falls on the line.
The two flowers land on the line.