The answer is oxygen .
Other planets don't provide life and air
Answer:
Explanation: It is not possible to have a unique product in a purely competitive market, because A Purely Competitive Market is a market which has a broad range of competitors who produce the same product. This type of market structure is also called as the Perfect Competition
Explanation:
In 1854, the Missouri Compromise was repealed by the Kansas-Nebraska Act. Three years later the Missouri Compromise was declared unconstitutional by the Supreme Court in the Dred Scott decision, which ruled that Congress did not have the authority to prohibit slavery in the territories.
D) Writing letters to state representatives is the most applicable in this situation as road infrastructure is run by the state government.