Which property in flexbox is responsible for the direction of flex items?

flex-direction. It defines the main axis of the container along which the flex items are placed.

Possible values:

• row: items are placed from left to right (default).
• row-reverse: items are placed from right to left.
• column: items are placed from top to bottom.
• column-reverse: items are placed from bottom to top.

Example of usage:

.flex-container {
  display: flex;
  flex-direction: column; /* Items will be arranged vertically */
}