What is a trade-off?
a - decreasing the amount of resources spent on all wants to reduce the total costs in future
b - replacing one resource with another resource to satisfy a want
c - organizing the use of a resource in a manner that fulfills all wants
d - reducing the amount of resources spent on one want to spend more on another want

Its D. reducing the amount of resources spent on one want to spend more on another want  (100% correct; just took quiz and got all answers right)

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.

jupiter is mainly composed of hydrogen and helium just like a star. spectral analysis of jupiter has revealed that in addition to hydrogen and helium, the planet is made of water, methane and ammonia. those elements are in trace amounts. the core of the planet is thought to contain some rock and metallic hydrogen. i hope this will give you the answer to your question! : d