Which national park in California, designated in 1994, protects a unique desert ecosystem with the largest concentration of Joshua trees in the world?

• A Death Valley
• B Mojave National Preserve
• C Anza-Borrego Desert
• D Joshua Tree National Park ✓

Joshua Tree National Park sits at the convergence of two distinct desert ecosystems ΓÇö the Mojave and the Colorado ΓÇö creating an extraordinary diversity of plants and animals.