1. Passive voice: "cooking should be offered as an elective" uses the passive voice, emphasizing the object and action of the suggestion, adding formality and complexity to the sentence.
2. Present participle as an adjective: "with critical subjects," "critical" as a present participle, used as an adjective, adds description and complexity to the sentence.
3. Object clause: "it's not a universal necessity" with "universal necessity" as an object clause, explains the necessity of "cooking," enhancing the presentation of the viewpoint.
4. Comparative structure: "deserve more focus than culinary skills" uses a comparative structure to emphasize the importance of educational content, enhancing the complexity and depth of expression in the sentence.