What does circumnavigation mean?

sailing around the world

discovering a continent

colonizing new lands

exploring territories

The circumnavigation mean "sailing around the world".

Option: A

Explanation:

Activity or sailing method, or otherwise traveling around anything, particularly the planet / globe / world. The very first Earth circumnavigation was sailed from Seville, Spain in 1519 as the Magellan-Elcano expedition and returned in 1522, after navigating the Indian, Atlantic, Pacific and Oceans.

In the late 20th century the emergence of commercial aviation, straightforward to circumnavigate Earth, possibly taking days rather than years. Currently, the Earth's circumnavigation obstacle has switched to human and technical stamina, pace, and less conventional methods.

this forms a narrow, steep sided inlet (sometimes deeper than 1300 metres) connected to the sea. the terminal moraine pushed down the valley by the glacier is left underwater at the fjord’s entrance, causing the water at the neck of the fjord to be shallower than the main body of the fjord behind it.

number 1 is a)