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How can I make two grids aligned and dynamic photos in them to be cropped

I just need help getting this mess look cleaner. I have two grids going in my blog collection side by side, one will be on tips of how to sell a house and the other side will be on buying a house. First I need to figure out how the photos can be cropped in the grid to mack the uneven layout. And second is how to keep the two grids stay aligned with screen size change.