The reply in response to me is,
The individuals standing within the nice line:
Swede, Icelander and Norwegian with Icelander and Norwegian holding arms.
The individuals standing within the disagreeable line:
Slovenian, Canarian and Mauritian with every of them standing individually.
This appears to be a puzzle about:
Three members of the nice line have:
National Flags with a cross in them.
Iceland and Norway have a white border to their crosses and therefore they’re holding arms whereas Sweden would not have a border to it is cross.
Three members of the disagreeable line have:
National Flags with totally different options.
Slovenia has horizontal tricolour, Canary Islands has vertical tricolour and Mauritius has horizontal stripes of 4 colors. Hence they’re standing other than one another.