The Cambrian period was important because it marked a dramatic burst of evolutionary changes in life on Earth. I<span>t is also the time when most of the major groups of animals first appeared in fossil records.</span>
In the small and large intestines
Blood is considered to be a tissue and it is part of the circulatory system.
The human circulatory system functions to transport blood and oxygen from the lungs to the various tissues of the body. The heart pumps the blood throughout the body. The lymphatic system is an extension of the human circulatory system that includes cell-mediated and antibody-mediated immune systems.
The answer will be the A coal.
The energy in coal comes from energy that was stored in giant plants that lived hundreds of millions of years ago in swamp forests. After some time dirt and water started to stack compressing it to rock or also known as coal.
I think this is because the molecules in the rock are so small. The rock is also a solid.