The correct answer is: d) All of the above.
Floods, erosion, and conflicts are all major causes of population displacement in Assam.
Floods are a regular occurrence in Assam, and they can cause widespread damage to property and infrastructure. In 2017, for example, floods displaced over 2 million people in Assam.
Erosion is also a major problem in Assam. The state is located in a region that is prone to landslides, and these landslides can cause significant damage to property and infrastructure. In 2018, for example, landslides displaced over 100,000 people in Assam.
Conflicts are also a major cause of population displacement in Assam. The state has a long history of ethnic conflict, and this conflict has led to the displacement of hundreds of thousands of people. In 2016, for example, over 40,000 people were displaced by conflict in Assam.
All of these factors contribute to the high levels of population displacement in Assam.