ANSWER:
The Mid Atlantic Range is the mountain range at the bottom of the Atlantic Ocean. 
Step-by-step explanation:
- This mountain range is a 'mid-ocean ridge' which is formed by the movement of tectonic plates. 
- This mountain range is the 'longest mountain range of the world' and is a constructive or divergent tectonic plate. 
- The mountain range is almost '40,000 km long' and is also an unbroken mountain range. 
- The mountain range also features many active volcanoes along its length.