Answer: CTRL + C or copy and paste
Explanation: to copy and paste highlight text by dragging mouse or clicking on touchpad and holding over selected text, if not on a computer but on a touch screen device ( ex: Phone, iPad etc) hold down until it is blue use the tear drops from the top and bottom to highlight the text you need. Then hold down the blue area until options come up stop holding and select copy and then go to where you want to put the text and hold down again and select paste. If on computer drag cursor over text while holding down on left click or holding down on touchpad, it will highlight light blue then left click or click on the touchpad with both fingers and repeat the process of copying and pasting as said before.
Hope this helps! :)