Answer: The theory that the Americas were populated by humans crossing from Siberia to Alaska across a land bridge was first proposed as far back as 1590, and has been generally accepted since the 1930s.
Explanation:
At some intersections, the traffic signals are equipped with sensors to detect vehicles, and the traffic signal will only change if: option C.
<h3>What is a traffic signal?</h3>
A traffic signal refers to a sign that is erected beside or above roads by a road safety agency, in order to give warnings and instructions to road users such as:
At some intersections, the traffic signals are equipped with sensors to detect vehicles, and the traffic signal are programmed to only change if a vehicle facing the red traffic light stops at the stop line.
Read more on traffic signal here: brainly.com/question/22768531
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Spending only as much as you earn
This is somewhat of a sustainable model, in which the resources used are limited, just as in the case of limiting usage of environmental resources to prevent long-term harm.
