Answer:
Tubules?
Explanation
The trachea, spiracle, and air sac are part of their respiratory system, Howeber, the tubules are what take away the carbon dioxide from their system. Im not sure if they produce the carbon dioixde. But they are a part of what removes the carbon-dioxide from their body.
Answer and explanation
Due to technical problems, you will find the complete answer and explanation in the attached files
<span>rainwater runoff into local streams </span>
Answer:
The population is people who buy mystery novels at that specific book store.