How to set one dropdown field values based on selection of another dropdown value.

How to set one dropdown field values based on selection of another dropdown value.

I need help setting up forms in Zoho Creators to automatically fill the "Delivery Person Number" dropdown with options relevant to the chosen "Transport" dropdown selection. In another form, each transport option is linked to multiple delivery person numbers (the "Delivery" field in the second picture corresponds to "Transport").

For instance, if "Airbus" is selected in the "Transport" dropdown, I aim to display only the numbers associated with "Airbus" in the "Delivery Person Number" dropdown.