Answer: supply shock that caused a leftward shift of the short-run aggregate supply curve
Explanation:
One of the main causes of the 1974 - 1975 recessions was the raising of oil prices and then the subsequent oil embargo on the United States by Arab members of the Organization of the Petroleum Exporting Countries(OPEC).
OPEC did not like the support that the United States was giving Israel and so placed an embargo on the U.S. such that the U.S. could no longer get much oil from the Middle East which she heavily relied upon.
This reduced the supply of oil drastically to the U.S. and resulted in a supply shock that shifted the short run aggregate supply curve to the left to reflect the fuel scarcity and the effect it had on the economy as production slowed down.
