Answer:
The natural barrier
Explanation:
If this is not a choice i did it so i could ace my math test to get sdome free answers. Just copying the guy above me.
coping: the top, typically sloping, course of a brick or stone wall.
Answer: this is an example of <u>operant variability.</u>
Explanation:
Operant variability means that results of an operation may vary so responses are sometimes easy to predict, at other times responding seems highly variable, unpredictable, or even random. The inability to predict is generally attributed to ignorance of controlling variables.
The correct answer would be false for the question. Okay?
