40 points - i'm very confused on what to do

Fossils can only be formed when? if mud, silt or tar is in the area to preserve the fossil ierosion does not occur and allows the fossil to form oxygen and microorganisms cannot decay the bones the area is dry and does not contain mud or silt

Why do german shepherds shed so much

The main ingredient of magma is a pahoehoe. b silca c dissolved gases d obsidian