How does adding the prefix mega- to a unit affect the quantity being described?

Explanation:

Mega as prefix to a unit affects the quantity substantially. Mega denotes a multiple of a million fold that is in ther order of 10⁶.

Other multiples used as prefixes to a unit are:

              hecto                               100

              kilo                                  1000

             mega                              1000000

When mega is added it shows a manifold of a million.

a polar bond is formed when electrons are shared unevenly between atoms

the correct answer would be b. amelia, because the particals of gas move really fast (charged particals) and gas also has a lot of room (particals move independently) so the only answer that has both of those is amelia's.