Ultimate causation refers to: a. what a creature wants or desires

b. the reason something has evolved

c. the immediate factors underlying a behavior

Ultimate causation refers to the effects of behavior on fitness, through an understanding of the ecology of the organism and its evolution.

european feudalism was a combination of legal and military customs in medieval europe that flourished between the 9th and 15th centuries. broadly defined, it was a way of structuring society around relationships derived from the holding of land in exchange for service or labour.

japanese feudalism. the era of feudalism in japan took place from the 12th through 19th centuries. during that period local rulers, either powerful families or military warlords, dominated the land, while the emperor was merely a figurehead and not a significant political presence.

sumerians were polytheistic, meaning they believed in many different gods. so, the best answer is c.