She is

kilometers away from her starting point
Answer:
True
Explanation:
Going even smaller than atoms would get you to subatomic particles such as quarks. From there, it is impossible to distinguish elements. So, yes, atoms are the smallest portions of an element that retains the original characteristic of the element.
It comes from the sun, and then it is converted to energy/electricity (by solar panels)
SI will always be in metric, so the answer is D. Meter.