Answer: cerebrum, cerebellum, and brainstem
Explanation: Cerebrum: is the largest part of the brain
brainstem is the posterior part of the brain adjoining, and structurally continuous with, the spinal cord
cerebellum (which is Latin for “little brain”) is a major structure of the hindbrain that is located near the brainstem
Your answer is simply the sympathetic nervous system
Definition-The sympathetic nervous system (SNS) is part of the autonomic nervous system (ANS), which also includes the parasympathetic nervous system (PNS). The sympathetic nervous system activates what is often termed the fight or flight response.
Explanation:(a) Was this an observational study or an experiment? Explain your reasoning. Experiment, because certain variables were controlled (he sets the screen brightness to low and then starts a movie) to determine if iPhones last longer if the screen brightness is set to low, and it proves the cause and effect relationship.
(b) What is the explanatory variable and the response variable? Response Variable- To determine if iPhones last longer if the screen brightness is set to low Explanatory variable- he sets the screen brightness of 10 of the iPhones to high and starts a movie, then the other 10 to low and starts a movie.
(c) Was a random sample used to collect the data? Yes- “he selects a random sample of 20 brand new iPhones”
Answer:
prevents unauthorized government access to private electronic communications
