Answer:
The anticlines and synclines are the folds develop on the surface of rocks. These folds develop due to pressure, stress and temperature. Synclines can be observed as downward folds, they look like troughs. These folds develops down the earth crust. The synclines develops as new rocks in the center and older rocks at the outside. Anticlines, the folds develop as upward arches. These folds develop away from the earth crust. In anticline the old rocks are in the center whereas the new rocks are at the corners.