title: How to highlight the text in paragraph
body: <p>How to highlight the text in paragraph on selection by mouse.
  I think I have to use some CSS3 property but I do not know what to use.</p>
  
  <p>see the below image, that is what I want to do...</p>
  
  <p>Here you can see that they have changed the background color and text color when someone select that portion.</p>
  
  <p><a href="https://i.stack.imgur.com/t2yLt.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/t2yLt.png" alt="enter image description here"></a></p>