Answer:
Drainage divide
Explanation:
A drainage divide is the ridge that divides to drainage basins or sub-basins. A drainage divide, is an elevated area separating neighboring drainage basins. Therefore, in general the greater the drainage basin, the greater the river flow.
The divide occurs on rough land along topographical ridges, and may be in the form of a single set of hills or mountains, known as a dividing range.
Drainage divisions, whatever the scale, occur in elevated terrain like mountain ranges or hills. In example, precipitation falling on one side of the divide will flow into one basin and precipitation falling on the other side will flow into another.
B. Because nickel silicon and magnesium is not correlated to lava(magma) so there for b is your answer
Plates at our planet’s surface move because of the intense heat in the Earth’s core that causes molten rock in the mantle layer to move. It moves in a pattern called a convection cell that forms when warm material rises, cools, and eventually sink down. As the cooled material sinks down, it is warmed and rises again.
Answer: it is the rock formed within the rocks crust.
Explanation: Rocks formed from magma are called igneous rocks. Intrusive igneous rocks form when magma cools inside the Earth. Rocks that form from magma erupting onto the Earth's surface are called extrusive igneous rocks. Extrusive igneous rocks have little to no time to crystallize and, as a result, the crystals are very small or microscopic.
