Coniferous trees in the tagia biome of Eurasia Larch, spruce, fir, pine

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 last photo u wonder what is this telling me to do?

The earth's internal process which drives seafloor spreading is