Which of the following statements about ice melting is true and why?
a. energy flows from the ice to its surroundings.
b. water molecules move from their fixed position.
c. water molecules lose energy.
d. the temperature of the ice increases as it melts.

The answer for this question is part B that is Water molecules move from their fixed position.

This is because when water is freeze it is in a solid condition that means the molecules are held together tightly and are are vibrating in their fixed positions.

As soon as the molecules gain energy they start to move around from their fixed positions and turn into a liquid.

In the process of doing so ice melts and becomes water.

this allows people to make the best decision or pursue the best option. when alternatives are weighed using their advantages and disadvantages, the option whose disadvantages outweigh the advantages (based on a qualitative or quantitative analysis) are shunned while those whose advantages outweigh their disadvantages are pursued.  

when insulating materials rub against each other, they may become electrically charged . electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. the material that gains electrons becomes negatively charged. the material that loses electrons is left with a positive charge.