What most likely happened in sediment layer 5?
a massive volcano erupted, causing global warming and lava flow, which in turn caused mass extinction.
more iridium was produced by space objects and dumped by local factories.
a massive dust cloud formed, causing global cooling and a lack of sunshine. this in turn caused a lack of plants and a mass extinction.
fewer impacts lead to a drop in iridium levels and a mass extinction caused by a lack of sunshine.

Hich of the following best summarizes the text’s depiction of the ancient indus valley cities (namely harappa and mohenjo-daro)? a. the cities were very plain and simple; the people did not focus on art and architecture, devoting their time instead to agriculture and the bare essentials. b. the cities were adorned, or decorated, with almost overwhelming displays of wealth and artistic architecture. c. the cities were extremely clean, relying on an advanced water and sewer system, though this was mainly constructed for the innermost areas of the cities. d. the cities were clean and peaceful, and they were designed in an extremely organized fashion, using an advanced water and sewer system to keep them this way

Which year held a congressional election and a presidential election

Because its government strictly controls its economy, north korea has a economy. a. command b. mixed c. traditional d. free market