Question

Found only in the Western Hemisphere and surviving through extremes of climate, hummingbirds' range extends from 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.

(A) Found only in the Western Hemisphere and surviving through extremes of climate, hummingbirds’ range extends

(B) Found only in the Western Hemisphere, hummingbirds survive through extremes of climate, their range extending

(C) Hummingbirds, found only in the Western Hemisphere and surviving through extremes of climate, with their range extending

(D) Hummingbirds, found only in the Western Hemisphere and surviving through extremes of climate, their range extends

(E) Hummingbirds are found only in the Western Hemisphere, survive through extremes of climate, and their range extends

Answer 1

(B) Found only in the Western Hemisphere, hummingbirds survive through extremes of climate, their range extending

Step-by-step explanation:

The correct answer (B) contains both a main subject and a main verb (hummingbirds survive) and the opening phrase properly introduces hummingbirds.

The final modifier - "their range extending" - may sound strange. This construction is correct, though likely to be used only in a more formal writing.