Answer:
The recording of physical actions or movements of participants is called <u>Nonverbal</u> observation .
Explanation:
Nonverbal Observation -
This is type of non linguistic transmission of any kind of information , via any auditory , visual , tactile and physical channels.
Nonverbal communication refers to the transmission of any kind of signal or message via any non verbal platform ,
Non verbal platform could be by facial expression , eye contact , any gestures , posture or the distance between two peoples .
Your answer is c Hope This Helped :0
C is correct. It should be rotation
A. Revolution is not definitly correct
B. Either
B. The fertilizers used by farmers contaminate the river.
