What are the South American yapok, Condor caenolestid, and monito del monte?

Question

What was the only South American country to send troops to fight in World War II after declaring war on Germany and Italy on 22 August 1942?

Answer 1

Opossums
They are (respectively): the water opossum (the most aquatic of living marsupials); the Andean shrew opossum; the only living species of the opossums known as microbiotheria.