Because freezing is the reverse of melting, a substance will

A. freeze at the same temperature at which it melts,depending on whether the temperature is raising or falling.

B. Boil at a lower temperature than it freezes.

C. Freeze at a higher temperature than which it melts

D. Not freezing at any temperature

A.

Explanation:

take water for example. when it is cooled past 0° C it freezes. when that ice is heated again, it will melt at 0° C. think of it like 0° is the line between the two states.

The answer is B Literacy rates are increasing in the region, and the gap between men and women is decreasing.

Explanation:

hope this helps