I would say Carbon, Hydrogen and Oxygen.
Answer:
Eli Whitney 's cotton gin and pioneering work with metal mechanical parts contributed greatly to industrialization. Large-scale domestic manufacturing, concentrated in the North, decreased dependence on foreign imports and resulted in an increase in wage labor.
Explanation:
<span>Erosion by rivers is a main valley-forming
process; other processes, such as movement of the earth's crust and
glaciers, also have an important part in some cases. The rate at which a
river deepens its valley depends on several factors.</span>
Pull-apart rift zones are generally associated with a divergent plate boundary.
<u>Explanation:</u>
In geology, rifts are those linear zones where lithosphere is getting pulled apart. Divergent plate boundary, also named as extensional boundary or constructive boundary is a linear characteristic that exist in between both the tectonic plates that tends to move away from each other.
Major rifts can be found alongside the central axis of mid-ocean ridges, where lithosphere and new oceanic crust is created between two tectonic plates in the path of a divergent boundary.
When the two plates pull apart, general faults or breakdowns are developed on both the sides of the rifts and the central blocks start to slide downwards thereby initiating the earthquakes.
The answer is d that glaciers erode and pluck from the entirety of the valley floor (including both the floor and walls of the valley) and the result is the U-shape of the ensuing valley as opposed to the typical V shape of valleys resulting from large streams or rivers.
