Question

which region refused to sell petroleum products to the united states during the oil embargo of the 1970s? australia the middle east south america

Explanation:

During the 1970s oil embargo, the Organization of Arab Petroleum Exporting Countries (OAPEC, with members from the Middle East) imposed an embargo on the US due to its support for Israel in the Yom Kippur War. Australia and South America were not the regions behind this embargo.

Answer:

The Middle East