Explain how can we determine what stars are made out of by observing their spectral lines

According to the online content activity for this lesson, what should you do if you do not understand the material you are trying to learn? a. try a new approach to learning the material. c. re-read the material b. give up d. find someone to give you the answers to the test select the best answer from the choices provided a b c d

The approach that contends psychology must study internal mental events in order to fully understand behavior is:

Along with removing drugs from the body, the kidneys also a. balance ph levels b. release hormones that regulate blood pressure c. release hormones into the stomach d. a and b