Answer:
1) circulatory and respiratory
2) endocrine
3) circulatory
4) circulatory and nerves
Explanation:
I think these are right. Sorry if they are not.
Answer: The process of experimenting and exploring before making a final decision.
<span>Humans have an endoskeleton, whereas insects have exoskeletons.</span>
i think the awnser is nutrition facts i really hope this helps ;)