Please help this is due in 20 min I will give you BRAINLIEST

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.

What is the correct order (starting from the surface) of warts layers

What man-made lake was created by the building of the hoover dam?