What is the name of the unique volcanic ecosystem in the state of Puebla, where a rare species of mole lizard (Bipes) — a worm-like reptile with only two small front legs — burrows in the sandy soil?

• A Pinacate
• B Tehuacan-Cuicatlan ✓
• C El Vizcaino
• D El Triunfo

The Tehuacan-Cuicatlan Biosphere Reserve contains the ajolote lizard (Bipes biporus), an amphisbaenian with mole-like forelimbs found nowhere else, adapted to the arid, cactus-studded landscape.