Question

insert two dashes where needed. new dna evidence suggests that the kiwi a small, flightless bird found in new zealand is closely related to the enormous, extinct elephant bird.

Explanation:

Dashes are used to set off non - essential or parenthetical information. In this sentence, "a small, flightless bird found in New Zealand" is additional information about the kiwi.

Answer:

New DNA evidence suggests that the kiwi—a small, flightless bird found in New Zealand—is closely related to the enormous, extinct elephant bird.