After Ken Dial had his “‘aha’ moment” (line 41), he

A) tried to train the birds to fly to their perches.

B) studied videos to determine why the birds no longer hopped.

C) consulted with other researchers who had studied Chukar Partridges.

D) observed how the birds dealt with gradually steeper inclines.

The passage identifies which of the following as a factor that facilitated the baby Chukars’ traction on steep ramps?

A) The position of their flapping wings

B) The speed with which they climbed

C) The alternation of wing and foot movement

D) Their continual hopping motions

As used in line 61, “document” most nearly means

A) portray.

B) record.

C) publish.

D) process.

What can reasonably be inferred about gliding animals from the passage?

A) Their young tend to hop along beside their parents instead of flying beside them.

B) Their method of locomotion is similar to that of ground birds.

C) They use the ground for feeding more often than for perching.

D) They do not use a flapping stroke to aid in climbing slopes

Which choice provides the best evidence for the answer to the previous question?

A) Lines 4-6 (“They jumped…​ air”)

B) Lines 28-29 (“They really…​ traveling”)

C) Lines 72-74 (“something…​ theory”)

D) Lines 57-59 (“The birds…​ slopes”)