I believe the answer is: Situation model
In a situation model, we would make an additional attempt to analyze the data at hand in order to examine how the data is collected and created.
Currently, this model is widely used to enchance people's ability in language comprehension and memory retrieval.
"Singular" is is pretty much the same as "one", they both mean a lone object.
Answer:
1) Be honest with the information you provided.
2) Ask questions.
3) Know how to make a complaint.
The correct answer would be the second option. The correct plan for his experiment would be that the temperature, the type of limestone, and the type of acid are controls. The amount of acid and the amount of damage to the limestone are variables. To determine the degree of damage of the acid it would be best that the amount of acid is the manipulated variable while everything else are assumed constant.
