Final answer:
The teacher is focusing on the oral language element of pronunciation, which involves the way sounds that form words are produced, contributing to clear and effective communication.
Step-by-step explanation:
The teacher who is helping students with their speaking and listening skills is focusing on the oral language element of pronunciation. Pronunciation involves the way a speaker makes the sounds that form words. Key components such as phonetics, which is the study of the sounds of human speech, and the nuances of vocabulary are important to develop clear and effective pronunciation. While grammar rules dictate how words and sentences are structured, they are more related to the formation of coherent and correct sentences than the actual sounds of the words. Proper pronunciation is essential to ensure communication is understood as intended.