Which subscription-based retail model pioneered the 'adopt-an-animal' concept that now generates over $100 million annually for wildlife conservation?

The retail landscape for wildlife conservation products has evolved dramatically in recent years, with innovative subscription models changing how consumers support animal welfare and habitat preservation. This poll tests your knowledge of a groundbreaking retail trend that has significantly impacted conservation funding and consumer engagement with wildlife causes.

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WWF's Species Adoption Program (launched 1973)
National Geographic's Wildlife Watch Subscription (launched 1982)
Conservation International's Guardian Species Box (launched 1990)
The Nature Conservancy's Habitat Heroes Program (launched 1985)