The ocean situated between the continent of Africa and Europe is the (C) Mediterranean Sea. The Mediterranean Sea is a large body of water that is connected to the Atlantic Ocean through the Strait of Gibraltar. It separates Southern Europe from Northern Africa and serves as a critical maritime route and cultural crossroads.

Tel Aviv is the major city of (B) Israel. It is one of the largest and most populous cities in Israel, located on the country's Mediterranean coastline. Tel Aviv is a vibrant and modern city known for its cultural richness, economic activity, and diverse population. It is a center for technology, innovation, and the arts in the region.

The river that is often referred to as the "lifeline of European trade" is (B) Rhine. The Rhine River is a major waterway in Europe that flows through several countries, including Germany, France, the Netherlands, Switzerland, Austria, and Liechtenstein. It plays a crucial role in the transportation of goods and is an important trade route, earning it the designation as the "lifeline of European trade."

The world's highest waterfall is located in (B) Venezuela. The waterfall is named Angel Falls (Salto Ángel in Spanish), and it is situated in the Canaima National Park in the Gran Sabana region of Venezuela. Angel Falls is renowned for its impressive height, with a continuous drop of about 3,212 feet (979 meters) and a total height of 3,281 feet (1,000 meters).

The headquarters of the International Atomic Energy Agency (IAEA) is located in (B) Vienna, Austria. Vienna has been the headquarters of the IAEA since its establishment in 1957. The city's selection as the headquarters reflects its role as a neutral and international city, making it a suitable location for an agency tasked with promoting the peaceful use of nuclear energy and preventing its use for military purposes.

The capital of Australia is (A) Canberra. Canberra is the purpose-built capital city of Australia, chosen for its central location between Sydney and Melbourne. It officially became the capital in 1927, succeeding Melbourne. Canberra houses the key government institutions, including the Parliament House and the official residence of the Prime Minister.

The headquarters of the United Nations Industrial Development Organization (UNIDO) is situated in Vienna, Austria. UNIDO is a specialized agency of the United Nations that focuses on promoting and accelerating industrial development in developing countries. It works to enhance economic growth, reduce poverty, and improve living standards by fostering sustainable industrialization. The choice of Vienna as the headquarters reflects the city's historical significance as an international diplomatic and organizational hub.

London is situated on the bank of the (A) Thames River. The River Thames is a major waterway flowing through the city of London, and it has played a significant role in the historical and cultural development of the city. The Thames River is the longest river entirely in England and is central to the geography and life of London.