Adding a pop-up for both computer and mobile devices

Hi all,

I am wondering if there is a way to add an option to a survey question, where respondent can click on a word or a button to then show a pop-up box with more information?

I tried the method described in the below, but couldn’t get it to work. 

I followed the above, without really understanding it (!!) and I get my key word underlined and showing as a tool tip, and the info will show if I hover. 
However, how do I get this key word to be clickable on a mobile device? 

The code I have used in my survey question (HTML view) is below. 

The word “here” is where the tooltip is shown - but is not clickable on a mobile device.

My apologies in advance if this is an obvious fix!

Thanks, Mike.

HTML: 

Have you, or a spouse/ family member, had any of the following symptoms?

<b>Please hover <abbr title="Cough; cold; sore throat" rel="tooltip"><span style="color:red;">here </abbr><span style="color:black;"> for examples of symptoms</span></span></b>