Which of the following best describes the process of condensing?

The correct answer is A gas turning into a liquid.

Method lens: First identify the measured quantity, then match the equation or particle idea to the command word. This question asks: Which of the following best describes the process of condensing. The correct response is A gas turning into a liquid, because changes of state are explained by particle energy and arrangement. In Changes of state, the marking point should connect directly to explain condensing using decreased particle energy and closer particle arrangement. If the question includes values, the working must keep the appropriate unit and operation; if it is an explanation, it must name the relevant particle behaviour or energy change. This item belongs to Changes of state and the particle model, so avoid answers that switch to a different quantity, confuse heat with temperature, or describe gas pressure without collisions when collisions are the reason. Checkpoint 152 is distinct because it uses this exact question context and the method lens rather than a generic particle-model sentence.