To get columns with heading and content aligned top and button aligned on the bottom: use an inner section for the heading and content, and set the column vertical alignment to space-between.
Heading Text Here
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.
Heading Text Here
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus.
Another Heading Here
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus.
A Long Heading Here That Wraps
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus.
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.
Text is wrapped into the columns automatically.