Question

the rhea has a long what?
feathered tail
webbed feet
beak
neck

Explanation:

Rheas are flightless birds. They have long necks. They do not have a long feathered tail (they have short tails), their feet are not webbed (they have three toes adapted for running), and their beaks are not particularly long in the context of this question compared to their necks.

Answer:

neck