In a variable ratio schedule, the number of times a behavior must occur before it is rewarded changes over time.
<h3>What's a variable?</h3>
- Variable( computer wisdom), a emblematic name associated with a value and whose associated value may be changed.
- Variable( mathematics), a symbol that represents a volume in a fine expression, as used in numerous lores.
- Variable( exploration), a logical set of attributes.
<h3>How do you measure variables?</h3>
- Statistical variables can be measured using dimension instruments, algorithms, or indeed mortal discretion.
- How we measure variables are called scale of measures, and it affects the type of logical ways that can be used on the data, and conclusions that can be drawn from it.
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Answer:
There are differences between layers of the earth based on composition and in response to stress.
Explanation:
There are three layers of Earth based on 'chemical composition': the crust, the mantle, and the core. The outermost part is the crust which is less than 1% of Earth by mass. It consists of oceanic crust and continental crust. The mantle is hot and the last layer core is mostly composed of iron metal.
The physical behavior of earth depends on how much pressure it faces and its repose to stress. As we go deep inside the earth, the pressure and temperature increase. Lithosphere, Asthenosphere, Upper and lower mesosphere, outer and inner core are layers of Earth subjected to pressure. Lithosphere is the strongest layer. Asthenosphere being weaker than lithosphere.
The answer is A. I hope this helps
