Even tho I know only two of Those words
Answer:
Naturalistic observation
Explanation:
The observational research refers to the non-experimental studies in which the things are measured in uncontrolled or non-manipulative conditions that are observed in natural conditions.
The behavioural observation made in the natural conditions or in the environment the organism lives in is known as the naturalistic observation.
In the given question since the same condition is mentioned in which the observation is made outside the clinic therefore the naturalistic observation is the correct answer.
Europeans became involved in the slave trade, seeking larger numbers of slaves for their plantations.............African states expanded the slave trade to meet European needs and gain wealth