What part of speech is into

What is the main source of conflict in this passage? lee grew up near the old-growth forest. she loved wandering the trails and looking at the natural beauty around her. but the city council recently approved plans to cut down the forest in order to build a shopping center and apartment buildings. the council believed the development would create new jobs and provide more affordable housing. lee was upset when she heard about the plans to destroy her beloved forest, and she vowed to do something to save it.

Used for an event that has been completed before the present moment in time. simple past past perfect perfect progressive past perfect progressive

Which one event in the story almost caused them to turn back and give up? losing their donkeysthe descent into the volcanorunning into their first dead endlack of water