The correct answer is: Collision of the Indian and Eurasian plates.
The Indian and Eurasian plates are colliding, which is causing the Himalayas to rise. The Himalayas are the highest mountain range in the world, and they are located in the north of Manipur. The collision of these two plates is also causing the Indian subcontinent to deform, which is why Manipur has a lot of earthquakes.
The other options are incorrect because they do not explain the tectonic forces responsible for shaping Manipur’s landscape. The Pacific Plate is subducting under the Mariana Plate, which is located in the Pacific Ocean. The African Plate is moving northward, but it is not colliding with any other plates near Manipur. The Mid-Atlantic Ridge is a divergent plate boundary, which means that the plates are moving away from each other. This is not causing any tectonic activity in Manipur.
In conclusion, the tectonic forces responsible for shaping Manipur’s landscape are linked to the collision of the Indian and Eurasian plates. This collision is causing the Himalayas to rise and the Indian subcontinent to deform, which is why Manipur has a lot of earthquakes.