Asia is separated from Europe by________ mountains.

Correct option is D

Asia is separated from Europe by the Ural Mountains.

• The Ural Mountains, are a mountain range that runs approximately 2,500 km from the Arctic Ocean in the north to the Ural River and Kazakhstan in the south.
• The Andes Mountains are the longest continental mountain range in the world located in South America.
• The  mid-ocean ridge is the longest mountain range on Earth.
  The Alps (Europe), stretching over 1,200 km from France to Slovenia.
•  The Himalayan Mountains are the highest mountain range in the world in the Indian subcontinent, home to several of the world's highest peaks, including Mount Everest.