What is the name of the underwater mountain range

mid-ocean ridge

Explanation:

The longest mountain range on Earth is called the mid-ocean ridge. Spanning 40,389 miles around the globe. About 90% of the mid-ocean ridge system is under the ocean. This system of mountains and valleys crisscrosses the globe, resembling the stitches in a baseball.

do u have any answer choices man?

john maynard keynes developed new economic theories in response to the : b) great depression of the 1930s. his theories are so important that they are known as "keynesianism". in his works he supports the idea of a government with deeper involvement and intervention to end the great depression.