Oman is a country. i believe. just google it.
the ocean become an important area of study around 200 years ago due to fact that it was the time when scientists focused more on the oceanic biosphere. hope this help
A line is an endless collection of points that follow a straight path. there is no start and finish and there are no curves.
"imaginary" does not describe a line by definition because lines are definite points, not imaginary ones. "endless" does describe a line because, as stated, they have no start or finish. "curved" does not describe a line, because lines follow a straight path. "has no width" describes a line accurately because lines are one dimensional; when we imagine a line, we visualize it by drawing one with a certain width, but in geometry, lines do not have any width. it's just a representation. a line additionally does not "have two endpoints"--that would be a line segment, with a starting point and a finishing point. lines go on forever in both directions, so you wouldn't be able to find endpoints for it.