Size and functional complexity of cities

In the following diagram, four different index fossils are labeled: which of the labeled fossils comes from the oldest organism? a b c d

What happens when heat from inside earth is transferred to its surface? warmer material is pushed to the crust more dense material is pushed to the crust warmer material is pushed to the outer core less dense material is pushed to the outer core

Why do u think kenny is afraid when he realizes that the reading he has chosen to do will be for byrons calss? what happens after the reading that surprises kenny?