When it's about cross-country (and related biathlon), you can be sure it's only sons and daughters of Brazilians in Brazil...in other words, the entirely average Brazilian Or, better: those dominate these sports in Brazil. There do happen to be two young guys - one based in Austria and another in Spain - but they are exceptions in this case.
I find it interesting Brazil has pretty much two winter sports federations: one for snow, one for ice I'll refrain on commenting on them in terms of the work