A democratic concept that began in ancient Greece and served as a foundation for American government as outlined in the United States Constitution is the (1 point) Group of answer choices

separation of powers

bill of rights

executive branch

Which suggests the most critical aspect of the peak oil theory? 1) controversy rages over rumors that the fracking lobby in washington has influenced the statistics. 2) supporters and critics argue endlessly over the rate of extraction and shape of the bell curve. 3) saudi arabia will soon have to begin fracking, leading to protests and further destabilization. 4) a new oil discovery means a fresh peak cycle, making that region the target of aggressors.