I don't get this question can somebody please explain it to me? Thank You!

Which statement describes john tuzo wilson’s contribution to the theory of plate tectonics? he proposed that plates carry parts of the seafloor. he theorized that pieces of earth move for a limited time. he suggested that the asthenosphere is broken into segments. he observed seafloor cracks similar to existing cracks in the continents.

Equilateral triangle pbj is inscribed in a circle as shown. determine the measure of arc pjb.

Which of the following insects is a decomposer? a. mosquito. b. caterpillar. c. beetle. d. none of the above.