Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to use a ruler [title] Understand what a ruler is. [step] A ruler is a measuring stick marked with units for measuring along its edge. [substeps] These can be made of plastic, cardboard, metal, or fabric.

Ending1: [substeps] A ruler is composed of 1 ruler, which is the same size as a ruler's end. A ruler is divided into 3 columns, the first column in each column. Ending2: A ruler's handle is the largest part of its shape. It can be used in a variety of ways, for example to create the axes. Ending3: Marked units for measuring length along its edge. These can be for either english (inches) or metric (centimeters) units of measurement. Ending4: They may be of a variety of shapes or styles and are a good option when you want to measure things as stands for volume. The ends of the ruler will be marked in a grid or graphing grid for the standard measurements.

Answer format: ending1/ending2/ending3/ending4