Please choose the correct ending to complete the given sentence: Rock climbing: Two men describe lead climbing while one man in a bright green shirt climbs a climbing wall the other man wearing a dark green shirt holds the lead line and explains the process. the man in the dark green shirt

Ending1: climbs a flue while also demonstrating the process while at the same time giving instructions as he goes. Ending2: is seen climbing a high wall pressing on the small conical metal that is the climbing wall and explaining different sections that are facing the building. Ending3: climbs the wall several times standing on his arms. Ending4: places a strap and link to the climbing wall and loops a rope through the clip.

Answer format: ending1/ending2/ending3/ending4