Which describes the foramen magnum? large opening at the base of the skull that the spinal cord passes through
shallow depression on the skull to which the jaw bone attaches
large projection on the skull to which the jaw muscles attach
tiny spaces between the fused bones of the skull

Wetlands form where water and land meet. a lake with a wetland fringe can fill in with decayed plant and animal material to become a wet meadow. a pond can fill in to become a bog or fen. sediment can fill in a river marsh to become a swamp.flooding of coastal lowlands from rising sea levels has created broad coastal marshes that are protected from wave action by barrier islands or reefs. coastal wetlands also form when rivers deposit sediment as they reach the ocean. plants then take root and hold the soil firm against the forces of tides and waves.