Want to make font text size dynamic with window size

Hello, I am new to using CSS code and need some help. On my homepage I have a "Services" section with titles and a brief description of our services. I need help formatting the title size so when the webpage size is expanded, or made smaller, the type size of the titles for each service isn't split across multiple lines. It seems to me that the easiest way to attack this would be to use the custom css coding, but I am unsure. If anyone can help me create the code to paste into the custom css section, I would greatly appreciate it. Im not sure how to do it in a way that it would only apply to this type and selection of text.

Pictures below are of the exact type sections I am trying to change. First one is at size, the second one is with the window minimized slightly - displaying title type messed up.

Can you share your website URL and this page/section?