Which theory states that Earth's crust and rigid upper mantle move in different directions and at different rates over Earth's surface? A) seafloor spreading
B) ridge push and slab pull
c) plate tectonics
D) continental drift​

In 1933 the 21st amendment was added to the u.s. constitution, allowing for the manfacture, transportation, and sale of alacoholic beverages in the united states. why was this amendment needed?

Reading graphs: unemployment us unemployment rate (1961-2011) identify the trends in the graph and then use the drop- down menu to complete each statement from 1961 to 1965 unemployment was in the mid-2000s through 2011. unemployment was percentage unemployed 1961 1971 1981 1991 2001 2011 year

Dose local topography and sea surface temp contribute to differences in climate between baeious localities