The Austrian, Italian, and Swiss arms of the World Wildlife Fund yesterday urged the International Olympic Committee to delay for a year its choice of venue for the 2006 Winter Olympics so environmental issues can be more carefully considered. WWF says that instead of choosing a host city, the IOC should choose a host region or country so the events can be spread out geographically and more existing facilities can be used, cutting down on the construction of short-term facilities. The IOC is scheduled to choose a host city on June 19.