I’m not too sure I think it’s A
Answer:
Fat
Explanation:
Animals rely on fat for energy during hibernation.
Answer:
its the level of acid in substances
you put the amount of a item into a cup and add water.
Explanation:
To determine if your hypothesis was correct for future reference
Answer:
The human respiratory system contains the organs that allow us to get the oxygen we need and to remove the waste carbon dioxide we do not need. It contains these parts: two lungs. ... various structures in the chest that allow air to move in and out of the lungs.
