Answer:
C. Varieties of an element that differ only in the number of neutrons are called isotopes.
Explanation:
The Earth is approximately 
old. The solar system formed from giant gas clouds which was a part of the solar nebula.
The surface of soil which demarcates two soils of different geological ages is called a unconformity.
Palesol is the soil that lies between sediments or volcanic deposits. If the paleosol is older they have lithified rock.
Hence, option C is true.
Because earthquakes can start shaking and set off a volcano or erupt it
I believe the answer is: morality
The purpose of morality is to act as some sort of guidance to perform correct behavior that all 'rational' persons should do within a social group. Morality does not necessarily regulated by law, but violating it would definitely make a member of a social group the be negatively perceived by other members.
1. is tres, since he was the third president of the united states
Answer:King Harold II of England is defeated by the Norman forces of William the Conqueror at the Battle of Hastings, fought on Senlac Hill, seven miles from Hastings, England.Just over two weeks before, William, the duke of Normandy, had invaded England, claiming his right to the English throne.
Explanation:
