Decreased rainfall in an area that has dry climate could result in

Part a: in paragraph 2, you can infer from the phrase "..thegreat triumph in mathematics" that the lieutenant is:

Which is a mathematical statement consisting of a hypothesis and conclusion that has to be proven true? definition

Plants in the arctic tundra must be able to live a) in wide range of temperatures b) without sunlight for the most of winterc) without waterd) at high elevations