C) gravity because gravity compresses the start into the most compact shape possible
In Geography, when you mention characteristics, it refers to the actions and the ideas of man that changes or changed the Earth. Characteristics in Geography can also refer to as the natural and current features seen all around the Earth.
The coastline is the term used
Differences between the Troposphere and the Stratosphere:
The troposphere is the lowest level of the atmosphere, so it is in contact with the Earth’s surface. In contrast, the stratosphere is located above the troposphere, so it is not in contact with the Earth’s surface. Humans live in the troposphere, not the stratosphere. People only spend time in the stratosphere is when they are traveling through it on an airplane, or flying through it while riding in a rocket. The air density and air pressure are much lower in the stratosphere. In fact, stratospheric air is too thin for people to be able to survive without pressurized air to breathe.
The Earth's ocean is a large body of water that is divided into four parts: Atlantic, Arctic, Indian, and Pacific Ocean. Some countries like the U.S. started recognizing the Southern Ocean as the fifth, though it's still not always considered one of the main ones. The answer is B: four.