Although Alfred Wegener was considered as the "Father of the Plate Tectonics Theory", his theory was furthermore revised by Arthur Holmes. It was this scientist who suggested that the plate motions could be subjected from convection currents on the mantle. These convection currents would lead to the formation of different landforms.
The answer is B, differences in density, I believe.
A substance that is less dense will always stay above a substance that is more dense. The difference in density actually causes the water to move, forming a density current. In the ocean, the deep bottom currents are cooler and more salty than the currents above. Hope this helps, and I would appreciate Brainliest! : )
Answer:
The centre of sphere of part of which a lens is formed is called the centre of curvature of the lens.
The answer is noble gas. Since noble gas are constant and
unreactive. They can still shape compounds with other elements.
Group 15 is also group 5A and Group 17 is also group 7A. Elements in these sets
do not typically form ionic bonds; they are more on creating covalent bonds
since they're non-metals.
Therefore, that leaves us with B. from Group 1. They are metals (but Hydrogen)
which respond violently with water, and they form ionic bonds, for they drop
outer electrons easily.