Without any information i would say the industrial revolution and the pollution that occured because of it
The principle which allowed Marta to find her dog Roxy is known as an: d. absolute threshold.
<h3>What is an
absolute threshold?</h3>
An absolute threshold can be defined as the smallest (lowest) level of stimulus such as light, touch, sound, etc., that can be detected by a living organism, usually half the time.
In this scenario, a principle which allowed Marta to find her dog Roxy amid all of the other barking dogs is known as an absolute threshold.
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Answer:
One example of checks and balances is that the president can veto any bill passed by Congress, but a two-thirds vote in Congress can override the veto.
Another example: The House of Representatives and the Senate both have to pass the same bill before it can become a law.