Please choose the correct ending to complete the given sentence: Starting a campfire: A man is crouching in the woods next to a pile of stones. he

Ending1: is using a long piece of string to measure the distance of the stone. Ending2: picks up a stone and throws it several times while running. Ending3: is explaining the building of a fire. Ending4: starts using a technology called a heel to gather twigs.

Answer format: ending1/ending2/ending3/ending4