Final answer:
Sheikh Zaki Yamani was a Saudi Arabian politician who played a significant role in strengthening OPEC through his leadership and the imposition of oil boycotts against the West in the 1970s.
Step-by-step explanation:
Sheikh Zaki Yamani was a Saudi Arabian politician and the Minister of Petroleum and Mineral Resources from 1962 to 1986. He played a significant role in the strengthening of OPEC. OPEC, or the Organization of Petroleum Exporting Countries, is a cooperative formed in 1960 by oil-exporting nations. With Yamani's leadership, OPEC demonstrated its power in the 1970s by imposing a series of oil boycotts against the West, resulting in a severe energy crisis and increased oil prices.