The amplitude of a wave is a measure of the amount of energy it carries.
Unitary: no local decisions.
Federal: some local decision.
Confederation: a lot of local decisions.
<span>(A)SPIT
Spit also known as sand spit is a stretch of beach or sand built up that projects into the water. Spits are caused by wind blowing at an angle to the coastline, resulting in long-shore drift. The material moved during long-shore drift becomes deposited therefore causing a spit.</span>
The loss of top soil in very dry areas of the world is known as desertification. The correct option among all the options given in the question is option "B".<span>Desertification is
the phenomenon in which land degradation of a very dry region increases and the
water bodies typically dries up. This also results in not only loss of
vegetation but also animal life. This phenomenon can be caused not only due to
climate changes, but also due to human activities.</span>
