Please answer these in simple form and each individually

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.

Why does a tidal bulge occurs on opposote sides of earth

The physical processes that create most of earth's physical features, including mountains, are known as