Why My Responsive Page Doesn't Work

Hello. I made a responsive web page. It’s working good in Chrome DevTools. I can resize it in there it’s just working good. But when I try in the browser it doesn’t work responsively. I tried but couldn’t find what the problem was. I used the grid system. What do you think about that?

I found where the problem was. I didn’t edit photos at the bottom. When I edited them browser has started to work correctly.