C. Great Britain, France, Italy, and the U.S.
The legislature separates powers in government by using a system of checks and balances. It means that each of the branches of government can limit the powers of the others. In that way the power is balanced. For instance, the president vetoes the bills but then the Congress needs percentage of 2/3 votes in order to pass that bill after the president's veto. Apart from that, the Supreme Court plays an important role because every bill must be evaluated by it. Only after that examination the bills are declared laws.
The correct answer is C) genetic variation.
<em>The term that best describes the difference in colors of the birds below is genetic variation.
</em>
A genetic variation describes the variation of the sequence of the DNA in our genomes. This genetic variation allows humans, plants, and animals to have specific characteristics. In the case of the picture with the birds, these birds show a difference in colors due to genetic variation. Genetic variation is part of evolution, the genetic information that passes down from generation to generation.