As per our understanding you are supposed to display small featured image ,on home page.
Here we are providing you a two methods to solve your issue, it’s will depend on you , which one you feel comfortable to follow:
Case1: Please add this following css on child theme style.css file:
Note: You can change max-width and max-height value as per your requirement.
If you are technically sound on WordPress programming then only follow this steps.
Bring content.php templates from parent [site folder-> wp-content->themes->encounters->content.php] and paste it inside child theme[site folder-> wp-content->themes->encounters-child->content.php].
In content.php you will find this code,