Geologists obtain indirect evidence about earth’s interior by
a. measuring pressure differences at earth’s surface.
b. estimating temperature inside earth.
c. directly looking under the many layers.
d. recording and studying seismic waves.

Trees with light brown bark dominate an ecosystem the ecosystem has populations of insects that thrive on the tree bark over time some insect species developed certain physical characteristics that them thrive on the tree bark these physical characteristics also the insects defend themselves from predators which insect species is probaly the species with the new physical characteristics?