Help pls does anyone know this ? what type of structure is shown in the diagram?

Skills of homo sapiens were found an excavation. the skulls were preserved because the bodies were frozen. so, these fossils are (blank) fossils.the image shows the evolution of skulls beginning 2 to 3 million years ago. based on the image, modern human skulls(blank) ape skulls.

Which item is most likely part of the safety contract

Is water wet? my friends are debating.