This statement is false. Energy is definitely not 'always' required to force molecules to move from areas of high concentration to areas of low concentration. Energy is a property of objects in which produced and converted, that can be very useful to everyone's life.
The answer would be C, it would be more difficult for DNA to unzip. Hydrogen bonds are strong, but easy to separate.
Answer:C performing a courtship dance
Explanation:
The base level of a tributary would become HIGHER if a dam and a reservoir were constructed where it flowed into a trunk stream.