The formation that occurs when compression causes the crust to rise in one area and sink another is called a fold.

Here's a breakdown:

* Compression: When tectonic plates push against each other, the force is called compression.

* Folding: Compression forces cause the rock layers to bend and buckle. This bending creates folds, which can be large or small.

* Anticlines and Synclines: Folds typically have upward arches called anticlines and downward troughs called synclines.

Let me know if you'd like more details about anticlines and synclines!