Question

A strip of land connecting the island with the mainland is called ______________.
A. Isthmus
B. Continental Shelf
C. Tombolo
D. Confluence

Answer 1

Hint: The Pacific Ocean and the Atlantic Ocean is separated by a strip of land formed around 2.8 million years ago. This separation resulted in the creation of the Gulf Stream. This strip of land is either formed through volcanic activity or when the sea level drops.

Complete answer: A thin portion of land can be framed by volcanic action, making a chain of islands that block a channel and collect sediment, shaping an isthmus. This is the means by which the Isthmus of Panama was framed. A drop in ocean level can shape an isthmus as more land is uncovered over the water. In other words, it is a piece of land that has water on each side and interfaces two bigger land territories.

Let us examine the options
Option A - Isthmus is a strip of land that connects the island with the mainland or connects two larger areas of lands.
Option B - Continental Shelf refers to the tenderly slanting seaward extension of the continental plate. These elongated margins of each continent are occupied by generally shallow seas and bays. Continental Shelf of all oceans together covers 7.5% of the total region of the oceans.
Option C - Tombolo means pillow or cushion in Italian. It is a type of sandy isthmus. It is a deposition landform in which an island is joined to the terrain by a narrow piece of land, for example, a spit or bar. When joined, the island is then known as a tied island.
Option D - A confluence happens when at least two water bodies consolidate to shape a solitary channel. Confluence happens at the place where a tributary joins a bigger river, where two rivers join to make a third or, where two isolated channels of a river, having shaped an island, rejoin downstream.

Thus, the correct answer is option (A).

Note: Two famous examples of the isthmus are the Isthmus of Panama and the Isthmus of Suez. Isthmus of Panama is a strip of land that connects two large continents - North and South America. This narrow strip of land was formed about 3 million years ago and divides the Pacific Ocean and the Caribbean Sea. The Isthmus of Suez connects the Asian and African continents. It is 75 miles wide and separates the Red Sea and the Mediterranean Sea.