Answer:
Earth's varying distance from the Sun,
Explanation:
There has been an established fact that the sunrise and sunset times varies because of the earth’s tilt in its orbit and its varying distance from the sun. At different locations on the earth, the times when the sun comes up and goes down would certainly be different on any given day. The north of Gisborne in New Zealand witnesses the world's first sunrise each and every day.
To calculate the slope, the formula is (y1-y2)/(x1-x2) , which in this case, the answer would be:

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Given that Riley is a human, it's strange to use the terms erosion or weathering to describe her interaction with rocks. Nevertheless, Erosion is the transport of surface materials (soil, rocks, etc.) through the actions of wind, water, and ice, while weathering is the physical/chemical breakdown or change of objects due to weather conditions occuring mainly through the action of wind, water, and temperature on rocks and soil. This coupled with the fact that erosion occurs over a distance makes the best answer weathering.
<span>Geographers classify ecosystems by the D. plants and animals there.</span>