What happens to the particle in an Popsicle as it melts in the sun and turns to a liquid. or what happened to the particles?

The particles have separated.

Explanation:

In a solid, the particles, (called molecules) are held close together in an orderly fashion with  little freedom of motion. Molecules in a liquid are close together but are not held so  rigidly in position and can move past one another.

Upon heating, a solid (a popsicle in this case) will melt to form a liquid . The temperature at which this change occurs is called the melting point.

the correct answer is b