Sam conducted a naturalistic observation as a project for a psychology class. he observed the interactions of parents and children at a restaurant. many of the people he observed seemed to notice him. when sam described his work to his teacher, she suggested he find out more about the

observer effect

Explanation:

Observer effect: It refers to the fact that when an act is being observed, there is a possibility that it may affect the properties which are being observed. Observer effects are trouble to validity in educational research.

The observer effect may also refer to the Hawthorne effect, the formation of reactivity through which the subjects or person modifies the aspect of their behavior, in the reaction to their knowledge of being observed.

the correct answer is modern american cars are not available due to trade restrictions.

trade between cuba and the united states have serious restrictions. the u.s. imposed an economic embargo on cuba, that among other things means that modern american cars are not available due to trade restrictions.

in response to some governmental actions of the authorities from cuba, president john f. kennedy proclaimed an embargo on trade between both countries in february 1962. the trade embargo remains active until this day and was implemented directly by the departments of commerce and the department of treasury.

in president trump’s administration, there is a national security presidential memorandum that "strengthens the policy of the u. s.", affecting trade with cuba.

answer; genetics;