Answer:
The CNS
Explanation:
First, the entire CNS is enclosed in bone. The brain is protected by the skull, while the spinal cord is protected by the vertebra of the spinal column. The brain and spinal cord are both covered with a protective tissue known as meninges.
The answer to this would be D.) <span>If the Inquisition had access to black holes, this, instead of the rack, would surely have become the stretching device of choice.</span>
The top left, would be light energy from the sun, while the top of the circle would be living beings. Think about it just like plants that that gain energy from the sun through photosynthesis. Then the bottom of the circle would be nonliving beings, either decomposed plants or animals that bring nutrients to soil, or dead ones that we eat. This cycles through until the energy is rereleased through heat. Therefore the top right would be heat energy, every living thing on earth creates gradual amounts of heat. Imagine going for a run, you'll probably be hotter afterwards right? I know it's not the most scientific answer but its 100% right.
Hope this helps!
Because heating a substance will cause molecules to speed up and spread further apart causing a larger volume that will result in decrease in density, now cooling a substance will cause molecules to slow down and get closer together causing a smaller volume that will increase in density!