Q. Which of the following events are comes under diastrophism?
1. Orogenic movement
2. Plate tectonics
3. Earthquakes
Select the correct answer using the codes given below:

[A] 1 only

[B] 1 and 2 only

[C] 2 and 3 only

[D] 1, 2 and 3

Answer: D

All processes that move, elevate or build up portions of the earth’s crust come under diastrophism. They include:  

  • orogenic processes involving mountain building through severe folding and affecting long and narrow belts of the earth’s crust;  
  • epeirogenic processes involving uplift or warping of large parts of the earth’s crust;  
  • earthquakes involving local relatively minor movements;  
  • plate tectonics involving horizontal movements of crustal plates. 

Source: NCERT – XI Fundamentals of Physical Geography