Giving crown for correct answer ! 20 points

some consumers have limited money to spend on a large supply of potential products. the idea that a consumer needs to pick how to use a scarce resource is known as

a. demand

b. choice

c. scarcity

d. opportunity cost

About 140,000 japanese died in this japanese city when americans dropped an atomic bob at the end of world war ii

Some gamma ray bursts are hypothesized to come from mergers of neutron stars or black holes. if this hypothesis is correct, what else should we in principle be able to detect from such mergers? a. gravitiational waves b. x-ray bursts c. significant disruption of gas thousands of light-years away in the surrounding galaxy d. an "afterglow" of bright visible light, lasting for weeks

Which of the following is an environmental cost of agriculture? a. agronomyb. cash cropsc. pollutiond. crop rotation