What factors made rapa nui vulnerable to the kinds of events that led to its ruin?

The barren volcanic rocks could no longer sustain agriculture production and soon the farmers were no longer able to feed the population - without timber no one was able to build boats to escape the impending doom.

Explanation:

hope this helps :)

b toward the volcano.landward. the landward side of something is the side nearest to the land or facing the land, rather than the sea.