Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to rugby tackle [title] Tackle low, leading with your shoulder, to bring down any runner safely and effectively. [step] A rugby tackle is quick, simple, and safe if you keep your head up and lead with your shoulder. A good tackle has several components, and mastering them will prevent injuries and bring down opponents with ease : [substeps] Start in an athletic position, on your toes to adjust to the attacker's movement.

Ending1: Lead with your shoulder, driving it into their thigh or stomach. Keep your head up, tucking it along the butt of the attacker. Ending2: Position your hands over your right foot, and draw it back as you spring towards the attacker. This should result in you landing a smooth and streamlined tackle. Ending3: Stand with the ball against your chest, feet side-and slightly shoulder width apart and your arms at your sides. Lean in close, as if you were about to touch. Ending4: Your legs should be extended forward to spring out and protect your head. Use your biceps to deliver a powerful kick on the attacker, arms shoulder-to-shoulder.

Answer format: ending1/ending2/ending3/ending4