Explain your reason, using information from the articles you read. Give EXAMPLES of what is happening in the world to support your opinion:

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.

Which of the following is evidence to the past existence of glaciers?

What is the mostly tropical region in asia