What resource powered the 20th century and built the modern world?

Seed plants that lived during the carboniferous impact life on earth today because a. they are the ancestors of all plant life on earth. b. their remains formed coal, which is an important resource. c. they produced fossils that are used to date many geologic events. d. their presence caused oxygen levels to drop, allowing animals to evolve.

The red square is a famous historical site that is located in

During which era in earth's history were the first insects? mesozoic precambrian cenozoic paleozoic