What is the sun made of

What is a metal replacement reaction

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.

If an area has high air pressure and low humidity, what type of weather will it most likely have? plz !