Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to dive into a pool [title] Find a deep diving pool. [step] Since diving means entering a pool headfirst, the water has to be deep enough so that you don't hit the bottom too quickly and risk getting a head or spine injury. The red cross considers nine feet to be a good depth for diving if you want to be especially cautious, but the diving area in many pools is eight feet deep.

Ending1: [title] Position yourself where you can dive straight in the water with minimal movement. [step] This will improve the likelihood of getting to the bottom of the pool later in the day. Ending2: Never dive into a pool that's less than eight feet deep. [substeps] If you're unsure how deep a pool is, it's best to avoid diving there. Ending3: Some pools have tennis courts, large beach areas, or splash pools. [title] Look for a well drained and clear area. Ending4: Look for any broken or damaged diving boards. [title] Dig a small hole in the bottom of the swimming pool.

Answer format: ending1/ending2/ending3/ending4