Astudy in which data from the past is examined the people, animals or things on whom experiments are performed a study in which a treatment is applied and responses are observed experimental conditions imposed on the subjects a study in which data is collected without anything being done to the subjects

either b or c, sorry idk

life will not be easy it will be filled with war, lack of resources, damaged planet, and lack of land to live on.

i imagine life will be easier in the sense that we will have better technology and better health and medical advances as well as infustructure growth and economic resilliance we will have much stronger militaries and probably be constintly fighting with other countries for resources and lang that is actually cleanenough to live or farm on . as well i think the need for fresh water will only brainliest answer lol

answer: c

explanation: