An individual working in which field of psychology might study the effects of drugs or try to explain behavior based on chemical activities in the nervous system?

Psychobiology

Explanation:

Psychobiology is the science that focuses on studying the psychology of individuals based on their biological functions. In other words it deals with the interactions between biology (neurological system, neurotransmitters) and their effects on the individual behavior.

Therefore, an individual working in psychobiology might study the effects of drugs (biological) or try to explain behavior based on chemical activities in the nervous system (explaining behavior based on biology)  

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the correct answer is :

{b.}   ( american workers lose job opportunities )

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    -sprinkles

giant impact theory - the moon was formed from the collision between earth and another mars-sized body.

colliding planetesimals hypothesis - the moon was formed from the same cloud of material as earth.

capture hypothesis - the moon was locked into orbit by earths gravity as it was passing by it.

accretion hypothesis - the moon was formed from collisions and combining of planetesimals.

i think this is right, if not and you know better let me know.