A teacher can develop the listening skills of language learners by:

Concept

Listening is a receptive language skill that develops through purposeful, varied, and active engagement with spoken input, not through mere passive exposure. Effective listening instruction follows two linked principles: authentic, varied input, where learners hear a range of speakers, accents, and language sources rather than a single repetitive voice; and active processing, where learners are given tasks that require them to interpret and respond to what they hear rather than simply absorbing sound.

Application

Applying this to the given item: the keyed option describes a teacher creating opportunities for learners to listen to a variety of language sources and people, combined with other listening activities. This satisfies both principles above, variety of input plus active engagement, making it the pedagogically sound method for developing listening skills.

Contrast: why the other options fall short

• Listening to everything passively gives learners exposure to sound but no task that requires them to attend to, interpret, or respond to meaning, so active processing is missing.

• As described, a teacher speaking continuously, in class and outside, offers learners only the teacher's own voice as spoken input, without the variety of voices, accents, and registers that real listening competence requires.

• Treating listening as a skill practiced in isolation, disconnected from speaking, reading, and writing, works against the integrated view of language skills that effective instruction follows.

Because it supplies both varied authentic input and active listening tasks, the keyed option aligns with established language-pedagogy principles for developing listening skills, and it matches the CTET (Paper 1, August 2023) official answer key for this item.