**Answer:**

The continents Asia and Africa are separated by the **Suez Canal**.

**Explanation:**

The Suez Canal is an artificial sea-level waterway in Egypt that connects the Mediterranean Sea to the Red Sea. It was constructed between 1859 and 1869 and has since played a crucial role in international trade by providing a shortcut between Europe and Asia.

**Here are some important points about the Suez Canal:**

1. **Location:** The Suez Canal is located in Egypt, connecting the Mediterranean Sea to the Red Sea.

2. **Importance:** The Suez Canal is one of the most important waterways in the world, serving as a major trade route between Europe and Asia. It provides a shorter and faster route for ships traveling between the two continents compared to the alternative route around the Cape of Good Hope.

3. **Construction:** The construction of the Suez Canal was a massive engineering project led by the French diplomat Ferdinand de Lesseps. It took ten years to complete and involved the excavation of a canal through the isthmus of Suez.

4. **Dimensions:** The Suez Canal is approximately 120 miles long and varies in width from 675 feet to 1,050 feet. It has a minimum depth of 66 feet, allowing the passage of large vessels.

5. **Importance for Trade:** The Suez Canal greatly reduces the distance and time required for ships to travel between Europe and Asia. It facilitates the transportation of goods, including oil, between the two continents, making it a vital route for international trade.

6. **Economic Impact:** The Suez Canal has a significant impact on the Egyptian economy. It generates substantial revenue through tolls and fees paid by ships passing through the canal, contributing to the country's GDP.

In conclusion, the Suez Canal separates the continents of Asia and Africa. Its construction has had a profound impact on international trade and has become a crucial route for ships traveling between Europe and Asia.

**Answer:**

The correct answer is option 'A' - Suez Canal.

The continents Asia and Africa are separated by the Suez Canal, which is an artificial sea-level waterway connecting the Mediterranean Sea to the Red Sea. It is located in Egypt, specifically in the Isthmus of Suez, a narrow strip of land that forms a natural connection between the two continents.

**Explanation:**

The Suez Canal has played a significant role in international trade and maritime transportation since its opening in 1869. Before its construction, ships had to navigate around the southern tip of Africa (the Cape of Good Hope) to travel between Europe and Asia, which was a much longer and more dangerous route.

The construction of the Suez Canal was initiated by Ferdinand de Lesseps, a French diplomat, and engineer. It took ten years to complete and involved the excavation of a 120-mile long channel through the isthmus. The canal was designed to allow ships to pass through without the need for locks, as it is a sea-level canal.

The Suez Canal has had a significant impact on global trade, as it provides a shortcut between Europe and Asia, saving both time and money. It greatly reduces the distance and travel time for ships sailing between the Mediterranean Sea and the Indian Ocean, making it a crucial shipping route.

The canal is also important for the economies of the countries it connects. Egypt, the host country, benefits from toll fees paid by ships passing through the canal, which contributes to its revenue.

In conclusion, the continents Asia and Africa are separated by the man-made Suez Canal. This canal has revolutionized global trade and transportation, providing a shortcut for ships traveling between Europe and Asia and significantly reducing travel distances and times.