Hi @lukmann, welcome to ODK!
The ODK docs have a number of sections dealing with various aspects of form design. And xlsform.org is a great resource. Also, two related topics in the forum that have been previously posted:
An example would be a survey sheet with:
+----------------------+------+------------+
| type | name | label |
+----------------------+------+------------+
| select_multiple pets | pet | Choose one |
+----------------------+------+------------+
Ignore that the question says "Choose one" and it's a select_multiple 
. And a choices sheet with:
+-----------+------+-------+----------+
| list name | name | label | image |
+-----------+------+-------+----------+
| pets | doge | Doge | doge.jpg |
| pets | cat | Cat | cat.jpg |
+-----------+------+-------+----------+
With doge.jpg and cat.jpg files uploaded to your server along with the form definition file. To get something like this:
