Question

Respiration in birds __________.
A) is inefficient because air only moves in one direction

B)is highly efficient and ensures that air moves in multiple directions

C) is highly efficient and ensures that air only moves in one direction

D) is inefficient because of how air first enters into the body

Answer 1

well i tried to look it up and i can tell you its either b or c

Answer 2

the answer is b

Answer 3

Thank you for your help :)

Answer 4

np anytime :)