In the Photoshop one way to delete layers is by clicking...The black and white circle.The fx.The piece of paper at the bottom.The trash can at the bottom.

In Photoshop, one common way to delete layers is by clicking on the trash can icon located at the bottom of the Layers panel. This icon represents the "Delete Layer" function, allowing users to easily remove selected layers from their project. You can also delete layers by selecting the layer you want to remove and then either dragging it to the trash can icon or pressing the Delete key on your keyboard.

While the other options mentioned (the black and white circle, the fx icon, and the piece of paper) have their specific purposes—such as creating adjustment layers or applying layer styles—the trash can is specifically assigned for deleting layers. Therefore, the correct answer is "The trash can at the bottom."