Answer;
-The less dense, the more the ice will float, allowing animals to stay afloat and not in the water
Explanation;
-When water freezes, water molecules form a crystalline structure maintained by hydrogen bonding. Solid water, or ice, is less dense than liquid water. Ice is less dense than water because the orientation of hydrogen bonds causes molecules to push farther apart, which lowers the density.
-This means that ice floats on water and that lakes freeze from the top down to the bottom.This is vital for animals that live on ice, as their habitats would be greatly reduced or not exist at all if ice sank.
Option c. dendrochronology
tree rings or dendrochronology they allow to use it in calibration for carbon-14 on temporal placements of fragments of wood (from long dead trees).
Example Bristle cone pines (1957) 4723 years old
There are actually 2 kinds of minerals mainly in our human bone. They're calcium and phosphorus.
There are also other types of minerals, but they're in very small amounts. Mainly are those 2.
We can take in these 2 minerals by eating food such as diary foods, meat, eggs etc.
Also, if we have a lack of intake of calcium or phosphorus, one of the deficiency disease can be rickets, like soft bones, legs may bend outside as a child or bones may crack easily in adults.
Answer:
The answer is A) An element—An element can not be broken down chemically into a simpler substance