题目选项分析

Found only in the Western Hemisphere, hummingbirds survive through extremes of climate, their range extendingfrom Alaska to Tierra del Fuego, from sea-level rain forests to the edges of Andean snowfields and ice fields at altitudes of 15,000 feet.

Hummingbirds are found only in the Western Hemisphere, survive through extremes of climate, and their range extendsfrom Alaska to Tierra del Fuego, from sea-level rain forests to the edges of Andean snowfields and ice fields at altitudes of 15,000 feet.