"Clicking and dragging" is a way to move certain objects on the screen. To move an object, place the mouse cursor over it, press and hold down the left mouse button, then move the mouse while still holding down the left mouse button.

Which click is used to drag the item?

The left button on a mouse is the default button used to click, select, drag to highlight a word and/or object and used as a pointer.

How do you click and drag to select?

Also known as click-and-drag, drag-select is clicking in an empty area, holding down the mouse button, and dragging the cursor to another location. This action selects (highlights) everything from the beginning to the end of the drag.