An important factor that brought changes to the hunter-gatherer way of life was that
a.) there wasn’t enough rain for the crops they planted to grow.
b.) illness reduced their numbers.
c.) men began to outnumber women and the number of gatherers declined.
d.) large prey animals were becoming extinct.

An important factor that brought changes to the hunter-gatherer way of life was that large prey animals were becoming extinct.

A hunter-gatherer is a human living in a society in which most or all food is obtained by foraging (collecting wild plants and pursuing wild animals), in contrast to agricultural societies, which rely mainly on domesticated species.

The correct answer between all the choices given is the last choice or letter D. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.

large prey animals were becoming extinct.

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.