Alfred Wegener's theory of continental drift was not well accepted because he could not say what
force could be big enough for the continents to move. Current theories explain this movement
with
a. subduction zones at continental margins
b. hot spots forming under continents
c. magnetic reversals of the north and south poles
d. convection currents in the mantle

D. Convection currents in the mantle

Explanation:

Its like currents in the water which is pushing the boat towards another boat or anything in front of it. The currents are pushing the continents towards each other.

answer; by working independently, the states have a high likelihood of developing innovative solutions that can be employed in other states;

well, paralell is parallel. i am providing links to .

hope this !

a series circuit is one with all the loads in a row. there is only one path for the electricity to flow. if this circuit was a string of light bulbs, and one blew out, the remaining bulbs would turn off.

unlike in series circuits, a charge in a parallel circuit encounters a single voltage drop during its path through the external circuit. the current through a given branch can be predicted using the ohm's law equation and the voltage drop across the resistor and the resistance of the resistor.

a parallel circuit has certain characteristics and basic rules: a parallel circuit has two or more paths for current to flow through. voltage is the same across each component of the parallel circuit.