Why we say freezing is the reverse of melting

Energy is required to change a solid to a liquid. The reverse of this process is called freezing. Freezing is the change from a liquid to a solid state. Because freezing is the reverse of melting, a substance will freeze at the same temperature at which it melts.

Explanation:

bacteria could be both, harmful and to us. harmful bacteria could make us sick and probably even by getting the chances of getting a disease, but good bacteria fight it off with your immune system. there is always bacteria everywhere we go. we need to make sure to wash our hands after using the restroom, before eating, after eating, after petting an animal too. so you see, bacteria is everywhere and is harmful or . i hope this . : ) : ) : )