Answer:D
Explanation: The pulmonary air sacs of birds only permit a unidirectional flow of air through the lungs. Unidirectional flow means that air is inhale and exhale through one trachea alternatively. This means the bird lungs only receive largely fresh air which has a high oxygen content during inhalation and do not receive fresh during exhalation. While air flow bidirectional in mammals.
Organisms that utilize photons and nutrients from the abiotic environment
Explain to her that to stop for a week and then carrying on as this making her pale as she ain’t eating properly and this might not be suitable for her
Tell her to try something else like hot water cinnamon lemon and honey and that’s it tell her to try dis out
Helps fight off bad germs/diseases etc
