Final answer:
Citizens in oil-rich countries enjoy benefits such as improved infrastructure, high standards of living with subsidized amenities, and strong economies due to the revenue generated from oil and gas reserves.
Step-by-step explanation:
Citizens of oil-rich countries have benefited from their oil supplies in various ways. For example, in Oman, oil income has been used to build infrastructure such as free-trade zones, ports, luxury hotels, roads, and international airports, in addition to providing clean drinking water to rural areas.
In Brunei, the abundance of natural gas and crude oil contributes to a high standard of living, with free education and medical care, and subsidies for food, housing, and rice farming. The government is also focused on expanding the economy beyond the oil sector.
Norway, with its vast oil and natural gas reserves, has developed a robust economy and energy independence, influencing decisions such as not joining the EU. Similarly, Qatar has seen a rapidly growing economy and a high standard of living thanks to its enormous reserves of oil and natural gas.