Answer: A. the mid-ocean ridges
Explanation:
The features that form the longest mountain range on Earth is the mid-ocean ridges and spans about 40,389 miles around the earth.
The mid-ocean ridge has about 90% of its system under the ocean. They are formed as a result of the movement of tectonic plates.
We have 8 continents on the Earth
it means to be serious or determined
It takes "92 minutes" to orbit Earth
Hope this helps!
