This is the “Third Content Block”. It consists of 2 parts. Left part is a parent page and the 4 rows on the right are its child pages. Beautiful Gorilla on the left is featured image on the parent page.
Page to be shown on the left can be selected from the dropdown menu within the customizer front page section. This is a second child page of that parent page. The small image is featured image.
This is the third child page of the parent page on the left. The content is added into the page editor and the small image near the title is added as a featured image.