Nobody knows for sure what causes plate motion. Today, most scientists think that __ is the main force

In a right-angled triangle: 1- the hypotenuse is the longest side2- we can apply pythagorean rule which states that: (hypotenuse)^2 = (side1)^2 + (side2)^2for the given triangle,longest side is 15 cm  side1 = 9 cmside2 is 12 cm  to check whether the triangle is right-angled or not,compare (15)^2 to the summation of (9)^2 and (12)^in other words, compare 225 to the summation of 81 and 144if they are both equal, then the triangle is right-angles, otherwise, it is not.you haven't provided the diagram showing her work, so i cannot tell the choice. however, apply my explanation to the question you have.

The fact that the earth goes through natural cycles for example the ice age some scientists belive that it is just another cycle

The development in there economic is that is that they are a state of business. not to mention there government!

Earth is passing saturn in its orbit, with both planets on the same side of the sun