Answer:Beaches are always changing due to factors such as waves adding and eroding sand.
The answer is A. melting. The change from gas to liquid to solid will release energy and the change from solid to liquid to gas will absorb energy. So the other three are releasing energy.
Answer:A set of five nitrogenous bases is used in the construction of nucleotides, which in turn build up the nucleic acids like DNA and RNA. These bases are crucially important because the sequencing of them in DNA and RNA is the way information is stored.