Dr. billings studies brain wave patterns that occur when people are dreaming. he attaches a device to the outside of people’s skulls to measure electrical activity in the brain. what type of device is he using?

the device is called an Electroencephalography machine.

Explanation:

An EEG or Electroencephalography is an electrophysiological monitoring method to record electrical activity of the brain.

where is the option.let me know

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.