Alguien :) puede ayudar​

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.

When it is summer at the south pole, a. the northern hemisphere is tilted toward the sun. b. the southern hemisphere is tilted away from the sun. c. the northern hemisphere is tilted away from the sun. d. both the southern and northern hemispheres are tilted toward the sun.

Name three things that show evidence of evolution. write one sentence for each, explaining why it demonstrates evidence. (9 points)