adding a text below an image after clicking on it

I am beginner to HTML I have given a task to add a text below an image after clicking on it

I am trying this

<a href="hh.jpg">
<img src="hh.jpg" width="100" figcaption="has">
</a>

but it requires 2 pages to my task to get completed. and I have to do it in one page. in order to complete my assignment. can any one guide me how to do it...?