Concept:The error involves the incorrect use of the preposition "from" instead of "through" to indicate the means or method of transformation.
Explanation:In part (c), the phrase "from a process called condensation" is incorrect because "from" usually indicates a starting point or origin, not the method by which a change occurs.
When a gas turns into a liquid, it does so "through" the process of condensation, meaning condensation is the mechanism or procedure that brings about the change.
The preposition "through" correctly conveys that condensation is the means by which the gas becomes a liquid.
Thus, the correct phrase should be "through a process called condensation."
The error is only in part (c); parts (a) and (b) are grammatically correct.
Answer:(c)