How do i align collection items vertically against each other in grid?

How do I align the collection items vertically up against each other in grid layout? Please see image below. Thanks in advance!

Link to read only page: Webflow - Ed Stephens

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Hello, for this class “A / Testimonial /Base” remove padding top and bottom and make flex direction it vertical give minimum height 500px.
And second class “A/Testimonial / Author” top Margin make it Auto
As you can see image I have attached below
Hope this will help you