These sentences are all examples of ACTIVE voices.
Active voice is a grammatical voice common in many of the world's languages. It is the unmarked voice for clauses featuring a transitive verb in nominative–accusative languages, including English and most other Indo-European languages.
Hi!
Your answer is 4.
This is because there will be more dry land and less water access. and therefore crops would die and people would starve.
Hope this helps! :0)