A teacher gives a task to familiarise the learners with the vocabulary used in…

Concept: A lesson objective must be framed in terms of the specific type of language content the task targets. Vocabulary (lexical) teaching aims at words and their meanings, and is distinct from grammar teaching (sentence structure and rules), a reading-comprehension task on unrelated content, or a general cognitive skill such as critical thinking.

Application: Here the teacher's task is to familiarise learners with the vocabulary used in restaurants — that is, restaurant-related words such as menu, order, waiter, and bill. Since the task is vocabulary-based, the objective must correspondingly be to acquaint the learner with these lexical items.

Cross-check by elimination:

• Grammatical items concern sentence structure and rules, a different teaching goal from building a word-level vocabulary.

• A text about a holiday destination introduces unrelated reading content, not restaurant-related words.

• Developing critical thinking is a general cognitive skill, not tied to acquiring a specific set of words.

So the objective that correctly matches a vocabulary-familiarisation task is to acquaint the learner with the lexical items.