Answer:
variable ratio
Explanation:
Variable ratio: The term has been widely used in operant conditioning.
A variable-ratio schedule is a kind of reinforcement schedule, in which a particular response is being reinforced after an unforeseeable number of responses. It creates a high and steady response to the desired behavior and the extinction of this behavior is very resistant.
Example: Lottery games and gambling, etc.
The example given in the question above is an example of a variable-ratio schedule of reinforcement.
Answer: test had less than perfect reliability
Explanation: The test score used by the college to predict how a student will perform could be said to have less than perfect reliability. This proved to be the case due to the students actual performance when later admitted based on intervention. It shows that the test score can not consistently serve as proof that only students who have above the cut off mark will be good performers in the college. Therefore, it could be concluded that the test score had less than perfect reliability based on the the eventual performance of the student.
I would say A, since the north of Mexico is still temperate, its middle is subtropical, more animals can adapt to the climate and habitat
