Answer:
The Earth has different compositional and mechanical layers. Compositional layers are determined by their components, while mechanical layers are determined by their physical properties. The outermost solid layer of a rocky planet or natural satellite. ... The Earth has an outer core (liquid) and an inner core (solid).
Explanation:
The type of friction that acts on an object that is not moving is option A, static friction.
<h3>What is
static friction?</h3>
Static friction serves as a kind of friction that do occur between two object that are not moving which means the object are static in nature.
In this case, The type of friction that acts on an object that is not moving is static friction.
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I pretty sure that the answer is
D.) A politically neutral region
Europe is not a typically dry place (unlike for exampe Mesopotamia) so it does not need rivers for irrigation.
Instead, rivers are needed more for transport - they have served as a means of communication and for the exchange of goods.
For example, Danube allowed a big-scale trade between the cities lying on it: Vienna, Budapest and Bratislava.