Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to encourage a pet rabbit to exercise [title] Build an exercise pen (commonly called an " x pen ") for your rabbit. [step] Use dog exercise fencing that comes in panels to build the pen with. The x pen can be connected together in many shapes.

Ending1: The panels should be a flat, rectangular, triangle, or cone-like shape-they should have hearts or peace signs on them, too. [substeps] This type of pen is also helpful when you are going to the bathroom with your rabbit on a long leash. Ending2: [title] Wire the pen and create a climbing platform using cardboard to build the corner. [step] Use wood or plastic tubes to create a climbing platform out of wood, wire, metal tubes, or plastic tubes. Ending3: You can use such a pen both indoors and outdoors. [substeps] If the rabbit jumps out of pens, add shade cloth or a customized wire cover to the top of it to prevent it from escaping. Ending4: [substeps] You will need at least 10 " x 15 " boards, or 13 in (35.7 cm x 15. 5 cm) about 20 centimeter (3.8 in) wide strips with a 1 1/4 inch (0.6 cm) diameter length.

Answer format: ending1/ending2/ending3/ending4