Ocean ridges are been formed due to The upwelling of magma from the asthenosphere.
What is Ocean ridges?
Mid-ocean ridges can be regarded as a process which do occur along divergent plate boundaries.
This occurrence do happen where new ocean floor is created when the Earth's tectonic plates spread apart.
- It should be noted that As the plates separate, there would be rise in molten rock.
Therefore, option B is correct.
Learn more about Mid-ocean ridges at,:
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The correct answer is - C. Amu Darya.
The Karakum Desert is a desert located in Central Asia, it is a so-called ''cold desert'', which means that it has very high temperatures in the summer, but it's way below 0 degrees in winter, and it is one of the most northern deserts in the world. The Amu Darya river cuts across the desert, coming from the south-east and going in a north-west direction, Amu Darya practically splits the desert into almost two equal parts.
Mexico, I believe was the second to become independent, after the United States
