That temperature is known as the melting point. It is different for every substances.
Freezing.
Cause your body contains a very high temperature causing the solids to dissolve into liquids
Solid
When a liquid looses enough energy (heat), it turns into a solid.
Solids turn into liquids at their melting point.
Ice turns to water is the first example that comes into my mind.
All solid can be liquified if the temperature is high enough.
Yes, it does. In general, liquids and solids solubility will increase with temperature. The opposite for gases
The solubility increase with the temperature (extremely rare exceptions exist).
At room temperature only liquids can be evaporated; increasing the temperature also the solids can be evaporated.
liquids or gases. This is because metalloids have properties that are intermediate between metals and nonmetals, allowing them to exist as solids at room temperature. Meanwhile, many nonmetals have lower melting points and boiling points, resulting in their existence as gases or liquids at room temperature.
When solids are heated, they gain energy and vibrate more, causing an increase in temperature. Liquids, on the other hand, absorb the heat energy and may evaporate to form gases depending on the temperature reached.