Answer: option d. the Missouri and Ohio Rivers.
Explanation:
During the last ice age, there was reduction in the amount of solar radiation that hits the surface of the erth. As a result of this, some continents experienced a glacial growth and cold climates and the geography was also affected.
North America was covered by ice and the mid-western North America, the southern boundary of the north polar ice cap during past ice ages is marked by Missouri and Ohio Rivers.
Acceleration is non zero but the velocity is zero.
Answer: Option 2.
<u>Explanation:</u>
Acceleration is the speed that an object gains with in a short period of time. In the language of Mechanics, Acceleration is the change in the velocities of the objects with respect to the time. So when a ball is thrown up in the air, there will be some acceleration and there will be some speed that the ball will gain when thrown up.
Velocity is the speed of an object but in a particular direction. Velocity of an object is the rate of change of the position of the object with respect to the frame of reference of that frame. So the velocity of the ball up in the air is zero.
The balance of forces between internal pressures under continents and those under ocean basins is called the isostasy.
<h3>What is an isostasy?</h3>
It should be noted that an isostasy is the state of gravitational equilibrium that's between the Earth crust and the mantle.
According to the isostasy theory, a mass above sea level is supported by a mass below sea level, and as a result, the depth of compensation is the depth at which the Earth's total weight per unit area is equal everywhere around.
In this case, isostasy is the balance of forces between internal pressures under continents and those under ocean basins.
Therefore, based on the information, the answer is isostasy.
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