Image are not croped in new section slider

It will be nice if news section slider images to be cropped so that it will be of the same height. You can view this in https://techyamaraj.com/ on technology or science section. I cant add all the images of the post in the same size which is time-consuming thing. It will be better if the theme auto cropped the images in the News slider section.

The page I need help with: [log in to see the link]