What is the temperature at which a liquid continuously gives off vapors?

The boiling point is defined as the temperature at which a liquid begins to transition into a gas. At this temperature, the vapor pressure of the liquid reaches atmospheric pressure, allowing the liquid to continuously produce vapors. This process occurs throughout the liquid, not just at its surface, which distinguishes the boiling point from other temperature thresholds like the freezing point or melting point.

In contrast, the freezing point is where a liquid turns into a solid, while the melting point represents the temperature at which a solid becomes a liquid. The evaporation point, though a functional term, is less commonly used in scientific contexts and does not specifically denote a consistent temperature like the boiling point. At the boiling point, the conversion of liquid into vapor is vigorous and sustained, thereby making it the correct answer for the question posed.