Answer:
Your answer is C) Carbon Dioxide.
A and B is correct
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Secretion helps in moistening the food, making it easier to swallow and preventing oral infections.
Answer: 1. do honeyguides in different areas of the world have a similar symbiosis with humans?
2. how old are the birds when they learn to respond to the humans' calls?
3. could other birds in the region form a similar symbiosis with humans?
Explanation:
