Fact 1: Water vapor condensing in clouds causes rain.

Fact 2: Plants wither and die for lack of rain.

Given the two facts above, answer the question "Plants will die from a lack of water if vapor in clouds doesn't what?" with the following options: 
- support
 - root growth
 - swell
 - break off
 - evaporate
 - expand
 - protect them
 - condense


 

        condense 