Joey is hooked up to a machine that records tension in his forehead muscles when he experiences a headache. He can then monitor his subtle physiological responses. As he relaxes his forehead muscles, the pointer on the display screen may go lower. What type of device is Joey using? Please choose the correct answer from the following choices, and then select the submit answer button.

probably 3 since archeologists and historians don’t understand there writing.

d. the polar jet stream   lies between the polar easterlies and trade winds should be your answer

the period of human evolution has coincided with environmental change, including ('hominin' refers to any bipedal species closely related to humans – that is, on how do we know earth's climate has changed? a map showing dates and locations of prehistoric archeological sites and migration routes from africa into.

answer; a cost benefit analysis;