在响应时将图像保持在盒子内

I am trying to make my picture stay inside of the grey box that I have it in. However, every time I am try and resize the browser the picture pops out of that area. If anyone has any ideas . I wanted to add a Jsfiddle but since it has to do with pictures it doesn't show up and wouldn't help. Sorry about that... how I can keep the picture inside of that box that would really help. Thanks.I am trying to make my picture stay inside of t