Consider the following statements with reference to geomorphic processes:
1. Diastrophism encompasses all processes that move, elevate, or build up portions of the earth's crust.
2. Epeirogenic processes involve mountain formation via severe folding and affect long and narrow belts of the earth's crust.
3. Orogenic processes involving uplift or warping of large parts of the earth’s crust.
Which of the statements given above is/are correct?