The magnetic fields of earth and several other planets are produced by magnetic substances conductive materials in motion extreme temperatures extreme pressures

The answer is conductive materials in motion

Iread this book last year so take this with a grain of salt.gene jumps from the tree to compete with finny due to the fact that gene is always trying to do better than finny. he is put under the grasp of peer pressure due to finny almost forcing him to do this. ever since he first jumped finny kept pressuring him to jump since he thought gene enjoyed jumping.rather than uses this answer you should probably just reread chapters 3-4

No because a circle or pie graph usually shows percentages you'd need a line graph