Concept:Input in language learning refers to the language a learner is exposed to through listening or reading, which is then processed for understanding.
Explanation:Language input is the material learners hear or read, known as receptive skills.
Perception of language means hearing, assimilating, and understanding those sounds.
In conversation, input comes from what the other person says.
It is not the act of speaking (output) or content alone, but how the listener perceives the language.
Thus, input in conversation is the perception of language.
Answer:B. Perception of language