Alfred Wegener hypothesis of continental drift was replaced in 1967 by plate tectonics. Today, the theory of plate tectonics is widely, this theory explains the structure of the earth's crust and many associated phenomena as resulting from interaction of rigid lithospheric plates that move slowly over the underlying mantle.
Answer
Because there were so many resources available, the demand for them decreased, which led to a decrease in price which ultimately caused the economy to weaken.
Explanation: